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

    Jul 15, 2012, 11:18 AM
    cos^3-sin^3
    I need to verify the identity cos^3-sin^3/cos-sin = 1+sincos
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 15, 2012, 11:21 AM
    There is a difference of cubes on the numerator on the left side that you can use.

    Basically, it's:
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