Thread:HMcCoy/@comment-25501845-20151002161700

Hello, Recently I was doing a Trignometry Problem and got Stuck with it. Could You Please help?

Here is the Question.

Let:

secA-tanA = x

Prove that $$(X^2+1)/(x^2-1) = -cosecA $$. Here is what I did, $$ (secA-tanA)^2 +1 / (secA-tanA)^2 -1 = (1/cosA - sinA/cosA)^2 +1 / (1/cosA - sinA/cosA)^2 -1 $$ 