Найдите значения выражений. Created by bel122017. algebra-ru

Найдите значения выражений...

juleeekk 10. 12/(sin²37°+sin²(90°+37°))=12/(sin²37°+(cos²37°)=12/1=12

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zarembo73 $11) \frac{2sin( \alpha -7 \pi )+cos( \frac{3 \pi }{2}+ \alpha ) }{sin( \alpha + \pi )}= \frac{-2sin(6 \pi +( \pi - \alpha ))+sin \alpha }{-sin \alpha }= \frac{2sin( \pi - \alpha )+sin \alpha }{sin \alpha }= \\ = \frac{2sin \alpha +sin \alpha }{sin \alpha }= \frac{3sin \alpha }{sin \alpha }=3.$ $10) \frac{12}{sin^237+sin^2127}= \frac{12}{sin^237+sin^2(90+37)}= \frac{12}{sin^237+cos^237}= \frac{12}{1}=12. \\$

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