trigonometry

Related Questions

• If $\sqrt{x}+\frac{1}{\sqrt{x}}=2\cos \theta ,$then ${{x}^{6}}+{{x}^{-6}}=$

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• If $\tan A=\frac{1}{2},$then $\tan 3A=$

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• If $\sin \alpha =\frac{336}{625}$and $450{}^\circ <\alpha <540{}^\circ ,$ then $\sin \left( \frac{\alpha }{4} \right)=$

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• If $\sin (\alpha -\beta )=\frac{1}{2}$and $\cos (\alpha +\beta )=\frac{1}{2},$where $\alpha $ and $\beta $ are positive acute angles, then

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• In a $\Delta ABC$ ,side b is equal to

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