trigonometry

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September 22nd 2008, 07:44 PM
maeca

trigonometry

what is the value of sin Π/5 and cos Π/5?
September 22nd 2008, 07:57 PM
Shyam

Quote:

Originally Posted by maeca

what is the value of sin Π/5 and cos Π/5?

$\sin {\frac{\pi}{5}}= \frac{\sqrt{10-2 \sqrt{5}}}{4}$

$\cos {\frac{\pi}{5}}= \frac {\sqrt{5}+1}{4}<br />$

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