1. ## identities

Complete the identity:

tan(cot-cos)= ?

thanks
;D

2. Originally Posted by fotzefotze
Complete the identity:

tan(cot-cos)= ?

thanks
;D
I doubt this is how the original question is written. Go back, check then post it exactly as it's originally written.

3. nope. exactly like that.

4. Originally Posted by fotzefotze
nope. exactly like that.
*sigh* I really thought you'd re-post something like $\tan (\cot^{-1} x - \cos^{-1} x) = ?$ ...... But far be it for me to doubt you or your textbook.

Unfortunately, the question as you've posted it makes no mathematical sense. As such, it's undoable.

5. ## odd

I wonder how my teacher expects me to answer it then.

6. Originally Posted by fotzefotze
I wonder how my teacher expects me to answer it then.
Maybe you copied it down wrong.