Originally Posted by

**jd3005** I am having problems with a Formal Trigonometric Proof, and I hope to seek assistance here.

(cotx)/(cscx +1)= (tan x)(csc x)-tanx

I was able to work the left side to the following. (Work not included up to the point unless requested due to an error on my behalf.

( cos x ) (1 -sin x) / (1 - sinx^2) Mr F says: Substitute 1 - sinx^2 = cosx^2 and cancel the common factor of cos x and you get (1 - sin x)/cos x.

Now at this point, I am able to use the Pythagorean Identity to make the denominator cosx^2

Once at this step I am unable to continue because I seem to not understand what step is next.

Personally proofs have been difficult for me and any tips that you could leave me here would be much appreciated.