I'm trying to develop a proof for: tan(x+pi) - tan(pi-x) = 2tanx I keep plugging it into the double angle formula, but I'm getting lost after trying to clear the denominator. Please help. Thanks!!
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Double angle, or compound angle?
Originally Posted by ThanksForHelp I'm trying to develop a proof for: tan(x+pi) - tan(pi-x) = 2tanx Do you know that
Originally Posted by Plato Do you know that Oh, periodic formula.....tan(x+pi n) = tanx - I don't understand the tan(x-pi), but that's OK. I can also use the fact that tan is an odd function to get it in the proper form. Thanks now I got it! Great!!! Thanks again.
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