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  • Sep 23, 2009, 04:29 PM
    nesmira
    Calc (establishing Identities)
    Prove the identity!

    Cos (pi/2 - x) = sin X
  • Sep 24, 2009, 07:45 AM
    Unknown008

    Use your formulae:









    That's all, it's almost finished. You only have to simplify.

    I hope it helped! :)

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