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Math Help - Proving Identities help!

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    5

    Proving Identities help!

    Hi guys,

    I shall ask for your help again Ok, so here's the equation:

    Tan^3x + sinxsecx-sinxcosx = tanxsecx + sinx
    Secx-cosx
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  2. #2
    Senior Member
    Joined
    Jul 2009
    Posts
    397
    Hi purplesky

    \frac{tan^{3}x+sin(x)~sec(x)-sin(x)cos(x)}{sec(x)-cos(x)}

    =\frac{tan^{3}x}{sec(x)-cos(x)}+\frac{sin(x)[sec(x)-cos(x)]}{sec(x)-cos(x)}



    ...
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