Recommended Questions
- (cos x+cos y)^(2)+(sin x-sin y)^(2)=4cos^(2)(x+y)/(2)
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- Prove that: (cosx+cosy)^2+(sinx-siny)^2=4cos^2(x+y)/2
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- Prove that : (cos x + cos y)^2 + (sin x - sin y)^2 = 4 cos^2\ (x+y)/2
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- (cos x+ cos y)^(2)+(sin x- sin y)^(2)=4 cos^(2)""(x+y)/(2)
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- (cos x- cos y)^(2) +( sin x- sin y)^(2)=4 sin^(2)""(x-y)/(2)
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- सिद्ध कीजिए : (cos x+cos y)^(2) + (sinx -sin y)^(2) = 4cos ^(2)""(x+y...
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- (cos x - cos y)^(2) + ( sin x - sin y )^(2) = 4 sin^(2)((x-y)/2)
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- (cos x + cos y ) ^(2) + (sin x - sin y ) ^(2) = 4 cos ^(2) ""(x + y ...
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- (cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)
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