Question

please solve this question step by step

prove this ​

Answer 1

Answer:

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Answer 2

Answer:

cos a /seca-tana

cosa/(1/cosa)-(sina/cosa)

$\cos( { \alpha }^{2} ) = 1 - \sin( { \alpha }^{2} )$

=cos^2/1-sina

=1-sin^2a/1-sina

=(1+sina)(1-sina)/1-sina

=1+sina

hence proved