http://latex.codecogs.com/gif.latex?...plus;&space;1} Thank you
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What have you done? Do you know identities for cos(2x) and sin(2x)?
Am I somewhat close? http://latex.codecogs.com/gif.latex?...ce;+cosx}
multiply that by (cos x+sin x)/(cos x+sin x) Edit: oh, you were done two steps before. Expand the denominator.
Last edited by Bean; Aug 1st 2012 at 02:51 PM.
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