Bsinb+2csinc 4asina

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August undefined, 2024

Web在 ABC中，内角A，B，C所对的边分别为a，b，c，若A=π/3，且2bsinB+2csinC=bc+√3a，则 ABC的面积的最大值为______．相关知识点：解析由 A=π/3，2bsinB+2csinC=bc+√3a，可知 bsinB+csinC= (√3)/3bcsinA+asinA，得 b^2+c^2= (√3)/3abc+a^2，所以 2bccosA= (√3)/3abc，解得 a=2√3cosA=√3．又 b 2 +c 2 …

在 ABC中，角A,B,C所对的边分别为a,b,c，若A=π3，且2bsinB+2csinC…

WebB若角A、B、C成等差数列，则2B=A+C，又A+B+C=π，则B=π3，又2asinA+2csinC=acsinB+2bsinB，由正弦定理可得，2a2+2c2=abc+2b2，则a2+c2−b22ac=b4，由余弦定理得：cosB=a2+c2−b22ac=b4=12，则b=2，则2a2+2c2=2ac+2b2，a2+c2−b2=ac，a2+c2−4=ac⩾2ac−4，当且仅当a=c时等号成 … WebZ 3 x2 dx = Z 3x 2=;dx (2) = 3x 1 + C Z 5 + cos d = 5 + sin + C (3) Question 4. You may use a calculator on both parts of this question. Part A. Imagine an elliptical oil slick that at … kennet close wellingborough

三角形面积_百度百科

WebDec 5, 2024 · 2024-2024学年四川省南充市高三（上）零诊数学试卷（理科）-附答案详解.docx 21页. 2024-2024学年四川省南充市高三（上）零诊数学试卷（理科）-附答案详 … Web1在 ABC中，角A，B，C所对的边分别为a，b，c，若A=π3，且2bsinB+2csinC=bc+√3a．则 ABC的面积的最大值为( )．A.3√32B.√32C.3√34D.√34 2在 ABC中，角A，B，C所对的边分别为a，b，c，若，且则 ABC的面积的最大值为( ) A. B. C. D. 3在 ABC中，角A，B，C所对的边分别为a，b，c，若A=π3，且2bsinB+2csinC=bc+3√a.则 ABC的面积的最大值为( ) A. … WebShare your videos with friends, family, and the world kennet council recycling

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Bsinb+2csinc 4asina

WebDec 21, 2024 · `sin5A=5cos^4AsinA-10cos^2Asin^3A+sin^5A` class-11; trigonometric-ratios-of-multiple-and-submultiple-angles; Share It On Facebook Twitter Email. 1 Answer. 0 votes . answered Dec 21, 2024 by DevikaKumari (70.3k points) selected Dec 21, 2024 by TanujKumar . Best answer `L.H.S. = sin5A = sin(3A+2A) = sin3Acos2A+sin2Acos3A` ... Web30°在三角形ABC中,a/sinA=b/sinB=c/sinC,则csinB=bsinC 因为b=2csinB,所以csinB=b/2 b/2=bsinC,所以sinC=1/2,角C=30° 由正弦定理 1年前追问 5 Kwanl 举报第二问呢回答问题可能相似的问题已知三角形ABC中角A,B,C的对边分别为a,b,c,且cos²（π／2+A）+cosA=5／4,b+c=√3 1年前 1个回答已知三角形ABC中,角A,B,C的对边分 …

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Web因为a/sinA=2r 所以~sinA=a/2r 化简成 a平方+b平方=c平方+ab 因为c=2bcosA 代进去化简能得出结论~你自己算吧~别偷懒啊 WebSep 19, 2024 · This is the Solution of Question From RD SHARMA book of CLASS 11 CHAPTER TRIGONOMETRIC FUNCTIONS This Question is also available in R S AGGARWAL book of CLAS...

Web在 ABC中，角A，B，C的对边分别为a，b，c已知c=2√5，且2asinCcosB=asinA-bsinB+52bsinC，点O满足OA+OB+OC=，cos∠CAO=38，则 ABC的面积为（） A. 55 B. 3√5 C. 5√2 D. 55 Webb) Chứng minh tam giác ABC đều biết: AsinA+ BsinB BsinB+ CsinC + + B+C A+B CsinC+ AsinA C+A = sin A+sin B + sin C. Hoidap247.com - Hỏi đáp online nhanh chóng, chính …

WebNov 9, 2024 · sin5A=5cos^4AsinA-10cos^2Asin^3A+sin^5AClass:11Subject: MATHSChapter: TRIGONOMETRIC RATIOS OF MULTIPLE AND SUBMULTIPLE … WebMay 24, 2024 · Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto …

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Web简介：帕弥什病毒爆发后，发生在一座教堂里的故事… *本视频为《战；更多实用攻略教学，爆笑沙雕集锦，你所不知道的游戏知识，热门游戏视频7*24小时持续更新,尽在哔哩哔 … kennet day nursery readingWeb已知 ABC的内角A，B，C的对边分别为a，b，c，若2csinC＝ (a＋b) (sinB－sinA)，则当角C取得最大值时，B＝（）A．B．C．D．-组卷网组卷网 > 高中数学综合库 > 三角函数与解三角形 > 解三角形 > 正弦定理和余弦定理 > 正弦定理 > 正弦定理边角互化的应用题型：单选题难度：0.65 引用次数：1298 更新时间：2024/2/23 13:42:03 题号：15154510 已知 … kenneth01982 gmail.comWebI\,4asina se va folosi doar in stare tehnica impecabila respecatandude securitatea muncii. Se va acorda o atentie sporita se instructiuniile acelor deteriorari care pot altera sigurania in exploata-KnaufPFTOmbH& Co. KG PFT RITMOBedienunqsanleitunq. Stand01.2006. principiile Respectati de baza! kennetcook elmsdale family practiceWeb`sin5A=5cos^4AsinA-10cos^2Asin^3A+sin^5A` kennet christian centre newburyface bookWebThis is the Solution of Question From RD SHARMA book of CLASS 11 CHAPTER TRIGONOMETRIC FUNCTIONS This Question is also available in R S AGGARWAL … kennet centre thatchamWebProve that sin5A = 5cos^4AsinA - 10cos^2Asin^3A + sin^5A Please help me ASAP!!! Share with your friends. Share 0. We know De Moivre's theorem, applying which gives:-cos A + … kennet avon medical practiceWebHome; Explore Courses; Pricing Plans; Partner Courses; Doubts; Ask a doubt; My Analysis; Switch to Infinity; View Analysis; Create Your Own Test; Raise a Demand; Ask a doubt kennet doctors marlborough