Question

Question #6b326

Answer 1

As explained below

Explanation:

This is an identity in which left hand side can be proved equal to the right hand side or vice-versa.

In the present case let us start with the left hand side=

`(csc u -1)/cot u * (csc u+1)/(csc u+1)`

=`(csc^2 u -1)/(cot u (cscu+1))`

=`(cot^2 u)/(cot u (csc u +1))`

=`(cot u)/(csc u+1)` + Right hand side.