# Thread: Trying to prove a trig identity

1. ## Trying to prove a trig identity

this one is stumping me

cos^2x-cotx
--------------- = cot^2x
sin^2x-tanx

prove left to right

2. $\frac{\cos ^{2}x-\cot x}{\sin ^{2}x-\tan x}=\cot x\cdot \frac{\cos x-\csc x}{\sin x-\sec x}=\cot ^{2}x\cdot \frac{\sin (x)\cos (x)-1}{\sin (x)\cos (x)-1}=\cot ^{2}x.$