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Cot 2A=(Cot^2A-1)/(2cotA)?

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  • Cot 2A=(Cot^2A-1)/(2cotA)?


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cot^2a + tan^2a + 2 = sec^2a.cosec^2a. 1. Asked by Rajita Ghosal(ASIAN INTERNATIONAL PVT SCHOOL) , on 25/7/13 2: BEST ANSWER Certified by MeritNation ...
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Positive: 30 %
Cot 2A=(Cot^2A-1)/(2cotA)? Find answers now! No. 1 Questions & Answers Place. More questions about Science & Mathematics
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Positive: 27 %

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数学三角函数公式_数学_高中教育_教育专区. 暂无评价|0人阅读|0次下载 |举报文档. 数学三角函数公式_数学_高中教育 ...
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Positive: 30 %
... (A+B)=(cotAcotB-1)/(cotB+cotA);cot(A-B)=(cotAcotB+1)/(cotB-cotA)倍角公式tan2A=2tanA/(1-tan^2A) ... tan2A=2tanA/(1-tan^2A);cot2A=(cot^2A-1)/2cota.
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Positive: 25 %
5. cot 2A + tanA = cos2A/sin2A + sinA/cosA ... (A +A) = 2 {(cot^2A - 1)/2cotA} = cotA - 1/cotA = cotA - tanA = L ... (cos^2A - sin^2A/sinAcosA ...
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Positive: 11 %
... ;tan(A-B)=(tanA-tanB)/(1+tanAtanB) ; cot(A+B)=(cosAcotB-1)/(cosB+cotA) ;cot(A-B ... (1-tan^2A) ;cot2A=(cot^2A-1)/2cota ; cos2a ...
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Positive: 10 %

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