Question

1 + cos A / sin A = sin A / 1 -cos A​

Answer 1

Step-by-step explanation:

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

=> ( 1 + cos A ) ( 1 - cos A ) = sin A x sin A

=> 1 - cos² A = sin² A

=> sin² A + cos² A = 1