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Homework Help: Homework Help with trig ident

  1. Nov 29, 2008 #1
    1. The problem statement, all variables and given/known data
    Find the value of cos(arcsin u + arccos v)?


    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 29, 2008 #2
    You're going to have to be a little more specific, what are u and v? Are you looking to simplify this expression? As well, when you preview a post it adds the template to your post again, so remember to delete it.
     
  4. Nov 30, 2008 #3
    i suppsoe it should be a full stop instead question mark,
    btw Welcome Joshua to PF:smile:

    I think you have not written the whole question.
     
    Last edited: Nov 30, 2008
  5. Nov 30, 2008 #4
    Hello! Use cos(A+B)=cosAcosB-sinAsinB

    Then, use:
    cos[arcsin(x)]=√1-x2
    sin[arccos(x)]=√1-x2
     
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