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Math Help - One more trig identity please

  1. #1
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    One more trig identity please

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  2. #2
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    Re: One more trig identity please

    What have you done? Do you know identities for cos(2x) and sin(2x)?
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  3. #3
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    Re: One more trig identity please

    Am I somewhat close?
    http://latex.codecogs.com/gif.latex?...ce;+cosx}
    Attached Thumbnails Attached Thumbnails One more trig identity please-codecogseqn.gif  
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  4. #4
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    Re: One more trig identity please

    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; August 1st 2012 at 01:51 PM.
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