Hello again, guys. I need to prove the following identity:

$\displaystyle \frac{tan\theta}{cot\theta}-\frac{cot\theta}{tan\theta}=sec^2\theta-csc^2\theta$

After fiddling around with this for an hour and getting nowhere, I decided to bring it here for help. None of the identities I'm using seem to be of much help.

Thanks a bunch!