Question

Sin a/1+cos a=1-cos a/sin a

Answer 1

Step-by-step explanation:

Sina/1+Cosa

Sina(1-Cosa)/(1+Cosa)(1-Cosa)

Sina(1-Cosa)/(1-Cos²a)

Sina(1-Cosa)/Sin²a

(1-Cosa)/Sina

Answer 2

1+cos A / sin A = sin A / 1- cos A

answer:-

LHS=sin A ( 1- cos A)/(1+ cos A)(1- cos A)

= sin A (1- cos A)/ cos square A

= sin A (1- cos A )/ sin square A

= 1- cos A / sin A = RHS

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