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    nesmira's Avatar
    nesmira Posts: 1, Reputation: 1
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    #1

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

    Cos (pi/2 - x) = sin X
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #2

    Sep 24, 2009, 07:45 AM

    Use your formulae:









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

    I hope it helped! :)

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