Question

how can i solve this question

Answer 1

Sin A / 1+ cos A

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

=sin A*1-cos A/1-cos ^2 A

=sin A*1-cos A/sin^2 A

=1-cos A/sin A

=1/sinA-cosA/sinA

=cosec A-cot A

Hope It Helps