# identities

• Nov 1st 2008, 11:20 PM
fotzefotze
identities
Complete the identity:

tan(cot-cos)= ?

thanks
;D
• Nov 1st 2008, 11:28 PM
mr fantastic
Quote:

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.
• Nov 1st 2008, 11:32 PM
fotzefotze
nope. exactly like that.
• Nov 1st 2008, 11:54 PM
mr fantastic
Quote:

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.
• Nov 2nd 2008, 08:46 AM
fotzefotze
odd
I wonder how my teacher expects me to answer it then.
• Nov 2nd 2008, 03:34 PM
mr fantastic
Quote:

Originally Posted by fotzefotze
I wonder how my teacher expects me to answer it then.

Maybe you copied it down wrong.