Cos 2 a+cos 2 (a+b)-2cosa cosb cos(a+b)=sin 2 b Please give answer the question I will be anxious

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Arun · Answer

Cos^2A +cos(A+B) [Cos(A+B) - 2cosA cosB ] Cos^2A+cos(A+B) [ cosA cosB - sinA sin B -2 cosA cosB] Cos^2A - cos (A+B) [ cos (A-B) ] Cos^2A -( cos^2A -sin^2B) Sin^2B = RHS Regards Arun (askIITians forum expert)

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Cos 2 a+cos 2 (a+b)-2cosa cosb cos(a+b)=sin 2 b Please give answer the question I will be anxious

Cos²a+cos²(a+b)-2cosa cosb cos(a+b)=sin²b
Please give answer the question I will be anxious

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Cos 2 a+cos 2 (a+b)-2cosa cosb cos(a+b)=sin 2 b Please give answer the question I will be anxious

Cos2a+cos2(a+b)-2cosa cosb cos(a+b)=sin2bPlease give answer the question I will be anxious

1 Answers

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Cos²a+cos²(a+b)-2cosa cosb cos(a+b)=sin²b
Please give answer the question I will be anxious