Proving Identities help!

**purplesky828** · February 1st 2010, 02:54 AM

Hi guys,

I shall ask for your help again

Ok, so here's the equation:

Tan^3x + sinxsecx-sinxcosx = tanxsecx + sinx

Secx-cosx

**songoku** · February 1st 2010, 07:49 AM

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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