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January 31, 2015

January 31, 2015

Posted by **Ifi** on Sunday, October 28, 2012 at 10:07am.

My ans is (-sin x)/ (1+cos x), but at wolfram is

-tan (x/2). I think they simplify it but how did they do it? Sorry for my little knowlegde....

- Math -
**Steve**, Sunday, October 28, 2012 at 12:03pmlook up your half-angle formulas. This is a standard form.

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