1+secÂŽ sinÂŽ,secO IS – InterviewSolution

1.

1+secÂŽ sinÂŽ,secO IS

Answer»

1++ sec A)/ sec A = sin^2 A/(1 - cos A)

Here LHS = cos A +1.

RHS = (1-cos^2 A)/(1 - cos A)

= (1 + cos A) *(1 - cos A) /(1 - cos A)

= cos A +1 = LHS

Proved.

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