Prove sin(90-A)=cosA.avi

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Prove that cos( 90-a)sin(90-a)/tan(90-a)=1-cos2a

Prove sin(90-A)=cosA.avi

prove that sin(90-a)/cosec(90-a) + cos(90-a)/sec(90-a)=1

Prove sin(90-A)=cosA.avi

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