establish the identity be sure to work with only one side of

establish the identity be sure to work with only one side of the equation. cot v-1/cot v+1=1-tan v/1+tan v (need problem worked step by step)

Solution

(cot v-1)/(cot v+1) =(1-tan v)/(1+tan v)

LHS (cot v-1)/(cot v+1)

cotv = 1/tanv

So, (1/tanv -1)/(1/tanv +1)

= (1 - tanv)/tanv / (1+tanv)/ tanv

= ( 1- tanv)/( 1+tanv)

=RHS