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Thread: Trig Help Algebraic Expression

  1. March 28th 2009, 02:35 PM #1
    adam456006
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    Trig Help Algebraic Expression

    I need help with this trig expression writing it as an algebraic expression:

    sin(arcsin x + arcos x)
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  2. March 28th 2009, 03:09 PM #2
    mr fantastic
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    Quote Originally Posted by adam456006 View Post
    I need help with this trig expression writing it as an algebraic expression:

    sin(arcsin x + arcos x)
    Let \alpha = \arcsin x \Rightarrow \sin \alpha = x and \beta = \arccos x \Rightarrow \sin \beta = x and note that \sin (\alpha + \beta) = \sin \alpha \cos \beta + \sin \beta \cos \alpha .
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