Prove:- (secA - 1)/(secA + 1) = (1 - cosA)/(1 + cosA) Thank You~

asked Mar 14, 2023 123k views

15 votes

Prove:-

Thank You~

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2 votes

$= \sf \large ( \sec A - 1)/( \sec \: A + 1 )$

$= \sf \large ( (1)/( \cos A - 1) )/( (1)/( \cos A + 1 ) )$

$\sf \large \: = \frac{ \frac{1 - \cos A }{ \green{ \cancel{ \cos A}} }}{ \frac{1 + \cos A }{ \green{\cancel{ \cos A} }} }$

$\sf \large = (1 - \cos A )/(1 + \cos A )$

-,-

Valor answered Mar 19, 2023