Trigonometric sum.

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jagdish
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Trigonometric sum.

Unread post by jagdish » Wed Jan 19, 2011 4:15 pm

Question..........
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Re: Trigonometric sum.

Unread post by Moon » Wed Jan 19, 2011 10:38 pm

Solution:
\[ \sum \tan A=\frac{\sum \sin A \cos B \cos C}{\prod\cos A}=\frac{\sin(A+B+C)+\prod \sin A}{\prod \cos A}\]
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jagdish
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Re: Trigonometric sum.

Unread post by jagdish » Thu Jan 20, 2011 11:16 am

Thanks moon.
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