{"id":4691,"date":"2025-11-10T16:29:39","date_gmt":"2025-11-10T08:29:39","guid":{"rendered":"http:\/\/jhwk.online\/?p=4691"},"modified":"2025-11-11T11:46:12","modified_gmt":"2025-11-11T03:46:12","slug":"%e4%b8%89%e8%a7%92%e5%87%bd%e6%95%b0%e9%a2%984","status":"publish","type":"post","link":"http:\/\/jhwk.online\/?p=4691","title":{"rendered":"\u4e09\u89d2\u51fd\u6570\u98984"},"content":{"rendered":"\n<div class=\"wp-block-stackable-subtitle stk-block-subtitle stk-block stk-8afe3d6\" data-block-id=\"8afe3d6\"><style>.stk-8afe3d6 .stk-block-subtitle__text{color:#0693e3 !important;}<\/style><p class=\"stk-block-subtitle__text stk-subtitle has-text-color\">\u672c\u9898\u75312023\u7ea725\u73ed\u94b1\u65ed\u5347\u8bb2\u89e3\uff01<\/p><\/div>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"720\" style=\"aspect-ratio: 1280 \/ 720;\" width=\"1280\" controls src=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/11\/\u4e09\u89d2\u51fd\u6570\u98984.mp4\"><\/video><\/figure>\n\n\n\n<p>[ratemypost]<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-vivid-cyan-blue-color has-alpha-channel-opacity has-vivid-cyan-blue-background-color has-background is-style-wide\"\/>\n\n\n\n<h5 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color has-link-color wp-elements-8a052dbd5caa870510f1e594e9e095cf\">\u9898\u76ee\u5c55\u793a\u2014\u2014\u5148\u63a2\u7a76\u3001\u518d\u542c\u8bb2<\/h5>\n\n\n\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<hr class=\"wp-block-separator has-text-color has-vivid-cyan-blue-color has-alpha-channel-opacity has-vivid-cyan-blue-background-color has-background is-style-wide\"\/>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848\u89e3\u6790<\/summary>\n \n\n\n\n<p>(1)\u7531\u9898\u8bbe\u77e5\u25b3ABD\u9762\u79ef\u4e3a$\\displaystyle \\frac{\\sqrt{3}}{2}$\uff0c\u5f97$\\displaystyle \\frac{1}{2}\u00d71\u00d7\\displaystyle \\frac{a}{2}\u00d7\\sin\\displaystyle \\frac{2\\pi}{3}=\\displaystyle \\frac{\\sqrt{3}}{2}$\uff0c\u89e3\u5f97$a = 4$\u3002<p>\u7531\u6b63\u5f26\u5b9a\u7406\u5f97$\\displaystyle \\frac{1}{\\sin B}=\\displaystyle \\frac{2}{\\sin\\left(B + \\displaystyle \\frac{2\\pi}{3}\\right)}$\uff0c<p>\u5373$5\\sin B = \\sqrt{3}\\cos B$\uff0c\u56e0\u6b64$\\tan B = \\displaystyle \\frac{\\sqrt{3}}{5}$\u3002<\/p> <p>(2)\u4ee4$\u2220ADB = \\alpha$\u3002\u7531\u4f59\u5f26\u5b9a\u7406\u5f97$c^{2}=1 + \\left(\\displaystyle \\frac{a}{2}\\right)^{2}-2\u00d71\u00d7\\displaystyle \\frac{a}{2}\u00d7\\cos\\alpha$\uff0c$b^{2}=1 + \\left(\\displaystyle \\frac{a}{2}\\right)^{2}-2\u00d71\u00d7\\displaystyle \\frac{a}{2}\u00d7\\cos(\\pi &#8211; \\alpha)$\u3002<p>\u6240\u4ee5$b^{2}+c^{2}=2 + \\displaystyle \\frac{a^{2}}{2}$\uff0c\u7531\u9898\u8bbe\u53ef\u5f97$a = 2\\sqrt{3}$\u3002\u56e0\u4e3a\u25b3ABD\u548c\u25b3ACD\u9762\u79ef\u5747\u4e3a$\\displaystyle \\frac{\\sqrt{3}}{2}\\sin\\alpha$\uff0c<p>\u6545$\\sin\\alpha = 1$\uff0c$\\alpha = \\displaystyle \\frac{\\pi}{2}$\uff0c\u6240\u4ee5$b = c = 2$\u3002<\/p>\n<\/details>\n\n\n\n \n","protected":false},"excerpt":{"rendered":"<p>\u672c\u9898\u75312023\u7ea725\u73ed\u94b1\u65ed\u5347\u8bb2\u89e3\uff01 [ratemypost] \u9898\u76ee\u5c55\u793a\u2014\u2014\u5148\u63a2\u7a76\u3001\u518d\u542c\u8bb2 \u8bb0\\(\\triang [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4691","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"blocksy_meta":[],"_links":{"self":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4691","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=4691"}],"version-history":[{"count":5,"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4691\/revisions"}],"predecessor-version":[{"id":4719,"href":"http:\/\/jhwk.online\/index.php?rest_route=\/wp\/v2\/posts\/4691\/revisions\/4719"}],"wp:attachment":[{"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4691"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jhwk.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}