precal
posted by olivia .
cosx/sinxcotx=1

LS = cotx cotx
= cot^2 x
≠ RS
This is not an identity the way you typed it
if you meant
cosx/(sinxcotx) = 1
LS = cosx/(sinxcosx/sinx)
= cosx/cosx
= 1
= RS
See how important it is to use brackets when typing in this way ? 
I apologize 4 the typo, that's how the work was given to me.

But thanks alot!