# Math Help - Trigonometry

1. ## Trigonometry

Prove
TanA/(1- cotA) + Cot A / (1- tanA ) = 1 + tan A + Cot A

2. Originally Posted by prantik007
Prove
TanA/(1- cotA) + Cot A / (1- tanA ) = 1 + tan A + Cot A
= tanA/( 1 - 1/tanA) + 1/tanA*tan(1-tanA)
= tan^2(A)/(tanA - 1) - 1/tanA(tanA-1)
= [tan^3(A) - 1]/tanA*(tanA-1)
Factorize the numerator and simplify to get the result.

3. Can someone let me know for this

4. Originally Posted by martingoldstein
Can someone let me know for this