i am also having trouble with this identity! tan ( pi /4 + x ) - tan ( pi /4 - x ) = 2 sinx cosx tan ( pi /4 + x ) + tan ( pi /4 - x ) EDITTED!
Last edited by finalfantasy; Nov 4th 2007 at 12:41 PM.
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It is wrong because and
sorry about that, editted!
The first step is to realize that, Similarly, . Now, simplify the fraction and see what you get.
That's what I did, but the answer is not coming up. Do I have to do something to the left side?
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