Вычислите: [tex] \frac{5sin ( \frac{5 \pi }{2}- \alpha )}{8sin( \pi - \alpha )} \alpha = \frac{5 \pi }{4} [/tex]. Created by Azbox. algebra-ru

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Вычислите:
[tex] \frac{5sin ( \frac{5 \pi }{2}- \alpha )}{8sin( \pi - \alpha )}

\alpha = \frac{5 \pi }{4} [/tex]

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kirichekov

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$\frac{5sin( \frac{5 \pi }{2} - \alpha) }{8sin( \pi - \alpha )} = \frac{5sin(2 \pi + \frac{ \pi }{2}- \alpha )}{8sin \alpha } = \frac{5sin( \frac{ \pi }{2}- \alpha ) }{8sin \alpha } = \frac{5cos \alpha }{8sin \alpha } = \frac{5}{8} *ctg \alpha$ $\frac{5}{8} *ctg \alpha =\frac{5}{8}*1= \frac{5}{8} =0,625$

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Azbox August 2022 | 0 Ответы

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