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Question Number 36821 by Ajayraj1995 last updated on 06/Jun/18

$$>.2sin\frac{5\pi }{12}sin\frac{\pi }{12}slovethis.?$$

Commented bymaxmathsup by imad last updated on 06/Jun/18

$$=2sin(\frac{\pi }{2}-\frac{\pi }{12})sin\left(\frac{\pi }{12}\right)=2cos\left(\frac{\pi }{12}\right)sin\left(\frac{\pi }{12}\right)=sin\left(\frac{\pi }{6}\right)=\frac{1}{2}.$$

Answered by tanmay.chaudhury50@gmail.com last updated on 06/Jun/18

$$=cos\left(\frac{4\mathrm{\Pi }}{12}\right)-cos\left(\frac{6\mathrm{\Pi }}{12}\right)$$ $$=cos\left(\frac{\mathrm{\Pi }}{3}\right)-cos\left(\frac{\mathrm{\Pi }}{2}\right)$$ $$=\frac{1}{2}$$

Answered by Rio Mike last updated on 06/Jun/18

$$0.5$$

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