преобразуйте в произведение sin a - 1/2. Created by whatapity. algebra-ru

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преобразуйте в произведение sin a - 1/2

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$Sin\alpha-\frac{1}{2}=Sin\alpha-Sin\frac{\pi }{6}=2Sin\frac{\alpha-\frac{\pi }{6}}{2}Cos\frac{\alpha+\frac{\pi }{6}}{2}=\\\\=\boxed{2Sin(\frac{\alpha}{2}-\frac{\pi }{12})Cos(\frac{\alpha }{2} +\frac{\pi }{12})}$

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