Question

can u do this with in 5 min? ​

Answer 1

Answer:

YES SURE.......WHY NOT ;)

Answer 2

Answer:

RHS

= cot A / √1+cot^2 A = cot A / √ cosec^2 A

= cos A / sin A / 1/sin A = cos A

So, mind you the LHS in your question must be cos A and not cot A.

Hope this helps you !

Peace ^_^