Originally Posted by

**mi986** Hi, I have problem that asks, "Prove that the equations are identities."

I tried for hours to solve it, but I'm lost... I would really appreciate it if someone could help me on this.

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

The stipulation is that I can only use the trigonometric identities that I've learned so far..

Such as:

csc a = 1/sin a

sec a = 1/csc a

tan a = sin a/cos a

etc...

The pythgorean identities and Opposite angle formulas

So far I've tried switching it sines and cosines, tangent, and a few others but it never seems to come out right...

Thanks to anyone who can help.