trigonometry

Related Questions

• $\cos \frac{2\pi }{15}\cos \frac{4\pi }{15}\cos \frac{8\pi }{15}\cos \frac{16\pi }{15}$ =

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• In $\Delta ABC,$ $\text{cosec }A(\sin B\cos C+\cos B\sin C)=$

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• The maximum value of $a\cos x+b\sin x$is

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• If $\sin A+\cos A=\sqrt{2},$then ${{\cos }^{2}}A=$

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• If ${{\tan }^{2}}\alpha {{\tan }^{2}}\beta +{{\tan }^{2}}\beta {{\tan }^{2}}\gamma +{{\tan }^{2}}\gamma {{\tan }^{2}}\alpha +2{{\tan }^{2}}\alpha {{\tan }^{2}}\beta {{\tan }^{2}}\gamma =1,$then the value of ${{\sin }^{2}}\alpha +{{\sin }^{2}}\beta +{{\sin }^{2}}\gamma $is

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