{"id":4331,"date":"2025-10-18T11:13:38","date_gmt":"2025-10-18T03:13:38","guid":{"rendered":"http:\/\/47.95.222.19\/?p=4331"},"modified":"2026-02-27T16:23:43","modified_gmt":"2026-02-27T08:23:43","slug":"%e4%b8%89%e8%a7%92%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/jhwk.online\/?p=4331","title":{"rendered":"\u4e09\u89d2\u51fd\u6570"},"content":{"rendered":"\n \n\n\n\n<div class=\"wp-block-stackable-call-to-action stk-block-call-to-action stk-block stk-3960b93 is-style-default\" data-v=\"2\" data-block-id=\"3960b93\"><div class=\"stk-block-call-to-action__content stk-content-align stk-3960b93-column stk-container stk-3960b93-container stk-hover-parent\"><div class=\"has-text-align-center stk-block-content stk-inner-blocks stk-3960b93-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-eeed53d\" id=\"\u558a\u4f60\u6765\u8bb2\u9898\uff01\" data-block-id=\"eeed53d\"><style>.stk-eeed53d .stk-block-heading__text{color:#0693e3 !important;}<\/style><h3 class=\"stk-block-heading__text has-text-color\">\u558a\u4f60\u6765\u8bb2\u9898\uff01<\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-245933c\" data-block-id=\"245933c\"><style>.stk-245933c .stk-block-text__text{color:#0693e3 !important;}<\/style><p class=\"stk-block-text__text has-text-color\">\u628a\u77e5\u8bc6\u8bb2\u7ed9\u522b\u4eba\u662f\u6700\u9ad8\u6548\u7684\u5b66\u4e60\u65b9\u6cd5\uff01\u5b66\u4e60\u91d1\u5b57\u5854\u7406\u8bba\u548c\u8d39\u66fc\u5b66\u4e60\u6cd5\u90fd\u8bc1\u660e\u4e86\u8fd9\u4e00\u70b9\u3002\u5494\u5494\u6765\u8bb2\u4e3a\u4f60\u63d0\u4f9b\u4e00\u4e2a\u5e73\u53f0\uff0c\u8bf7\u4f60\u6765\u89e3\u7b54\u4e0b\u5217\u95ee\u9898\uff0c\u5e76\u5c06\u89e3\u9898\u8fc7\u7a0b\u5f55\u5236\u51fa\u6765\uff0c\u8ba9\u4f60\u56e0\u2018\u5206\u4eab\u77e5\u8bc6\u2019\u800c\u8fdb\u6b65\uff0c\u8ba9\u77e5\u8bc6\u56e0\u2018\u88ab\u5206\u4eab\u2019\u800c\u66f4\u6709\u610f\u4e49\u3002<\/p><\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-56c6eb0\" data-block-id=\"56c6eb0\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-b01f8c8\" data-block-id=\"b01f8c8\"><style>.stk-b01f8c8 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}.stk-b01f8c8 .stk-button{background:#0693e3 !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4294\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u67e5\u770b\u8981\u6c42<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n \n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-file alignright\" style=\"margin-top:0;margin-bottom:0;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\"><a id=\"wp-block-file--media-e3da4c6f-1496-439c-9762-0aa6fd203b87\" href=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/10\/\u4ea4\u4e92\u5fae\u8bfe\u5b66\u751f\u63a2\u7a76\u95ee\u9898\u2014\u2014\u4e09\u89d2\u51fd\u6570\u90e8\u5206-1.pdf\">\u9898\u76ee\u4e0b\u8f7d<\/a><\/div>\n\n\n\n<h5>\u9898\u76ee1<\/h5>\n\u5982\u56fe\uff0c\u5728$\\triangle ABC$\u4e2d\uff0c$\\angle BAC=\\displaystyle\\frac{2\\pi}{3}$\uff0c\u70b9$D$\u5728\u7ebf\u6bb5$BC$\u4e0a\uff0c$AD\\perp AC$\uff0c$\\displaystyle\\frac{BD}{CD}=\\frac{1}{4}$\uff0c\u6c42$\\sin C.$\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"406\" height=\"172\" src=\"http:\/\/47.95.222.19\/wp-content\/uploads\/2025\/09\/tzsanjiaohanshu1.png\" alt=\"\" class=\"wp-image-4326\" srcset=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/09\/tzsanjiaohanshu1.png 406w, http:\/\/jhwk.online\/wp-content\/uploads\/2025\/09\/tzsanjiaohanshu1-300x127.png 300w\" sizes=\"auto, (max-width: 406px) 100vw, 406px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-99afb23\" data-block-id=\"99afb23\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-6353a5c\" data-block-id=\"6353a5c\"><style>.stk-6353a5c {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4424\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u6cd51\u3001\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-22b24d4\" data-block-id=\"22b24d4\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-8cc0339\" data-block-id=\"8cc0339\"><style>.stk-8cc0339 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4502\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u6cd52\u3001\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$\\displaystyle\\frac{\\sqrt{21}}{10}$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee2<\/h5>\n\n\u5728\u9510\u89d2$\\triangle ABC$\u4e2d\uff0c\u89d2$A$\uff0c$B$\uff0c$C$\u6240\u5bf9\u7684\u8fb9\u4e3a$a$\uff0c$b$\uff0c$c$\uff0c\u82e5$\\displaystyle\\frac{\\sin B\\sin C}{3\\sin A} = \\frac{\\cos A}{a} + \\frac{\\cos C}{c}$\u4e14$\\sin^2 A + \\sin^2 B &#8211; \\sin^2 C = \\sin A \\cdot \\sin B$\uff0c\u6c42$\\displaystyle\\frac{c^2}{a + b}$\u7684\u53d6\u503c\u8303\u56f4\u3002\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-72ef982\" data-block-id=\"72ef982\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-97bff7f\" data-block-id=\"97bff7f\"><style>.stk-97bff7f {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4513\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u6cd51\u3001\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-63c65c1\" data-block-id=\"63c65c1\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-2cc3627\" data-block-id=\"2cc3627\"><style>.stk-2cc3627 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4534\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u6cd52\u3001\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$[\\sqrt{3},2)$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee3<\/h5>\n$\u25b3ABC$\u7684\u5185\u89d2$A\u3001B\u3001C$\u7684\u5bf9\u8fb9\u5206\u522b\u4e3a$a\uff0cb\uff0cc\uff0c$\u5df2\u77e5$(c &#8211; 2b)\\cos A + \\displaystyle \\frac{a^2 + b^2 &#8211; c^2}{2b} = 0$<p>\n\uff081\uff09\u82e5$a = 4$\uff0c$b + c = 8$\uff0c\u6c42$\u25b3ABC$\u7684\u9762\u79ef\uff1b<p>\n\uff082\uff09\u82e5\u89d2$C$\u4e3a\u949d\u89d2\uff0c\u6c42$\\displaystyle \\frac{c}{b}$\u7684\u53d6\u503c\u8303\u56f4.\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-067e5ec\" data-block-id=\"067e5ec\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-001a2e9\" data-block-id=\"001a2e9\"><style>.stk-001a2e9 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4618\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$(1) S=4\\sqrt{3}; (2) (2,+\\infty)$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee4<\/h5>\n\u8bb0\\(\\triangle ABC\\)\u7684\u5185\u89d2\\(A,B,C\\)\u7684\u5bf9\u8fb9\u5206\u522b\u4e3a\\(a,b,c\\)\uff0c\u5df2\u77e5\\(\\triangle ABC\\)\u7684\u9762\u79ef\u4e3a\\(\\sqrt{3}\\)\uff0c\\(D\\)\u4e3a\\(BC\\)\u4e2d\u70b9\uff0c\u4e14\\(AD = 1\\)\uff0e<p>\n(1)\u82e5\\(\\angle ADC = \\displaystyle \\frac{\\pi}{3}\\)\uff0c\u6c42\\(\\tan B\\)\uff1b<p>\n(2)\u82e5\\(b^2 + c^2 = 8\\)\uff0c\u6c42\\(b,c\\)\uff0e\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-d58deb5\" data-block-id=\"d58deb5\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-833d814\" data-block-id=\"833d814\"><style>.stk-833d814 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4691\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$(1) \\tan B=\\displaystyle\\frac{\\sqrt{3}}{5}; (2) b=c=2$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee5<\/h5>\n\u5728$\\triangle ABC$\u4e2d\uff0c\u5185\u89d2$A$\uff0c$B$\uff0c$C$\u7684\u5bf9\u8fb9\u5206\u522b\u4e3a$a$\uff0c$b$\uff0c$c$\uff0c\u70b9$O$\u662f$\\triangle ABC$\u7684\u5916\u5fc3\uff0c$a\\cos(C &#8211; \\displaystyle \\frac{\\pi}{3}) = \\displaystyle \\frac{\\overrightarrow{AO} \\cdot \\overrightarrow{AB}}{|\\overrightarrow{AB}|} + \\frac{\\overrightarrow{AO} \\cdot \\overrightarrow{AC}}{|\\overrightarrow{AC}|}$\u3002<p>\n\n(1)\u6c42\u89d2$A$\uff1b<p>\n\n(2)\u82e5$\\triangle ABC$\u5916\u63a5\u5706\u7684\u5468\u957f\u4e3a$4\\sqrt{3}\\pi$\uff0c\u6c42$\\triangle ABC$\u5468\u957f\u7684\u53d6\u503c\u8303\u56f4\u3002\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-ef69f42\" data-block-id=\"ef69f42\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-9de5fda\" data-block-id=\"9de5fda\"><style>.stk-9de5fda {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4649\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$(1) A=\\frac{\\pi}{3}; (2) (12,18]$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee6<\/h5>\n\u5728 \\(\\triangle ABC\\) \u4e2d\uff0c\u5185\u89d2 \\(A, B, C\\) \u7684\u5bf9\u8fb9\u5206\u522b\u4e3a \\(a, b, c\\)\uff0c\u4e14 \\(c = 2b\\)\uff0c\\(2\\sin A = 3\\sin 2C\\)\u3002  <p>\n(1) \u6c42 \\(\\displaystyle \\frac{a}{b}\\) \u7684\u503c\uff1b  <p>\n(2) \u82e5 \\(\\triangle ABC\\) \u7684\u9762\u79ef\u4e3a \\(\\displaystyle \\frac{3\\sqrt{7}}{2}\\)\uff0c\u6c42 \\(AB\\) \u8fb9\u4e0a\u7684\u9ad8\u3002<p>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-ef9a876\" data-block-id=\"ef9a876\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-2b70b34\" data-block-id=\"2b70b34\"><style>.stk-2b70b34 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=4833\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$(1) \\frac{a}{b}=\\frac{3\\sqrt{2}}{2}; (2) \\frac{3\\sqrt{7}}{4}$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee7<\/h5>\n(\u591a\u9009\u9898) \u5728\u659c\u4e09\u89d2\u5f62 \\( ABC \\) \u4e2d\uff0c\\( A \\)\u3001\\( B \\)\u3001\\( C \\) \u5bf9\u5e94\u8fb9\u5206\u522b\u4e3a \\( a \\)\u3001\\( b \\)\u3001\\( c \\)\uff0c\\( \\sin A = \\cos B \\)\uff0c\u5219( )<p>\n<p>A. \\( \\triangle ABC \\) \u4e3a\u9510\u89d2\u4e09\u89d2\u5f62\n<p>B. \u82e5 \\( a=1 \\)\uff0c\u5219 \\( b=\\tan B \\)\n<p>C. \\( 2\\tan B + \\tan C \\) \u6700\u5c0f\u503c\u4e3a \\( \\displaystyle\\frac{5\\sqrt{3}}{3} \\)\n<p>D. \\( 1 < \\cos A + \\cos B + \\cos C \\leq \\displaystyle\\frac{5}{4} \\)\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-272d4a4\" data-block-id=\"272d4a4\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-206d91e\" data-block-id=\"206d91e\"><style>.stk-206d91e {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=5564\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$BCD$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee8<\/h5>\n\u8bb0\\(\\triangle ABC\\)\u7684\u5185\u89d2\\(A,B,C\\)\u7684\u5bf9\u8fb9\u5206\u522b\u4e3a\\(a,b,c\\)\uff0c\u5df2\u77e5\\(a\\cos B &#8211; c = \\sqrt{3}a\\sin B\\)\uff0c\\(a = 3\\)\uff0e\n<p>(1)\u6c42\\(A\\)\uff1b\n<p>(2)\u82e5\u70b9\\(D\\)\u662f\u8fb9\\(BC\\)\u4e0a\u9760\u8fd1\\(C\\)\u7684\u4e09\u7b49\u5206\u70b9\uff0c\u4e14\\(AB \\perp AD\\)\uff0c\u6c42\\(AD\\)\u7684\u957f\uff0e\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-eadefb8\" data-block-id=\"eadefb8\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-03abfd6\" data-block-id=\"03abfd6\"><style>.stk-03abfd6 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"http:\/\/jhwk.online\/?p=5772\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u8bb2\u8bc4\u89c6\u9891<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848:$(1) A=\\displaystyle \\frac{5\\pi}{6}; (2) AD=\\displaystyle\\frac{\\sqrt{7}}{7}$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n<h5>\u9898\u76ee9<\/h5>\n\u5df2\u77e5$\\triangle ABC$\u4e3a\u9510\u89d2\u4e09\u89d2\u5f62\uff0c$\\sin(A-B)=\\dfrac{\\sqrt{2}}{10}$\uff0c\u4e14$\\tan C=7$\uff0e\n<p>(1) \u6c42$\\sin A\\cos B$\uff1b\n<p>(2) \u6c42$B$\uff1b\n<p>(3) \u82e5$\\triangle ABC$\u7684\u9762\u79ef\u4e3a$7$\uff0c\u6c42$\\triangle ABC$\u5916\u63a5\u5706\u7684\u5468\u957f\uff0e\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-14bea33\" data-block-id=\"14bea33\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-a569ce1\" data-block-id=\"a569ce1\"><style>.stk-a569ce1 {border-top-left-radius:13px !important;border-top-right-radius:13px !important;border-bottom-right-radius:13px !important;border-bottom-left-radius:13px !important;overflow:hidden !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u5f55\u5236\u4e2d<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n \n\n\n\n\u7b54\u6848\uff1a\uff081\uff09$\\displaystyle \\frac{2\\sqrt{2}}{5}$;(2)$B=\\displaystyle \\frac{\\pi}{4}$;(3)$5\\pi$.\n<\/details>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-2-color has-alpha-channel-opacity has-palette-color-2-background-color has-background is-style-wide\"\/>\n\n\n\n \n","protected":false},"excerpt":{"rendered":"<p>\u558a\u4f60\u6765\u8bb2\u9898\uff01 \u628a\u77e5\u8bc6\u8bb2\u7ed9\u522b\u4eba\u662f\u6700\u9ad8\u6548\u7684\u5b66\u4e60\u65b9\u6cd5\uff01\u5b66\u4e60\u91d1\u5b57\u5854\u7406\u8bba\u548c\u8d39\u66fc\u5b66\u4e60\u6cd5\u90fd\u8bc1\u660e\u4e86\u8fd9\u4e00\u70b9\u3002\u5494\u5494\u6765\u8bb2\u4e3a\u4f60\u63d0\u4f9b\u4e00\u4e2a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[],"class_list":["post-4331","post","type-post","status-publish","format-standard","hentry","category-tzzy"],"blocksy_meta":[],"_links":{"self":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4331"}],"version-history":[{"count":63,"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4331\/revisions"}],"predecessor-version":[{"id":5774,"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4331\/revisions\/5774"}],"wp:attachment":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4331"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}