Cos A by 1 + sin a + 1 + sin by cos A is equals to 2

1.	Cos A by 1 + sin a + 1 + sin by cos A is equals to 2
Answer» Cosa/1+sina + 1+sina/cosa=(1-sina)2+(1+sina)/1-sin2a=2(1-sin2a)/(1-sin2a)=2LHS=RHS

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