trigonometry

Related Questions

• In triangle $ABC$ if $a,b,c$ are in A. P., then the value of $\frac{\sin \frac{A}{2}\sin \frac{C}{2}}{\sin \frac{B}{2}}=$

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• ${{\cos }^{2}}{{76}^{o}}+{{\cos }^{2}}{{16}^{o}}-\cos {{76}^{o}}\cos {{16}^{o}}=$

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• $\cot \theta =\sin 2\theta (\theta \ne n\pi $, n is integer), if $\theta =$

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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 $\cos (\alpha +\beta )=\frac{4}{5},\sin (\alpha -\beta )=\frac{5}{13}$ and $\alpha ,\beta $ lie between 0 and $\frac{\pi }{4},$then $\tan 2\alpha =$

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