trigonometry

Related Questions

• If $\tan \theta =\frac{x\,\sin \,\varphi }{1-x\,\cos \,\varphi }$ and $\tan \,\varphi =\frac{y\sin \,\theta }{1-y\,\cos \,\theta }$, then $\frac{x}{y}=$

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• If A, B, C, D are the angles of a cyclic quadrilateral, then $\cos \,A+\cos B+\cos \,\,C+\cos D=$

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• If $\frac{\tan 3\theta -1}{\tan 3\theta +1}=\sqrt{3}$, then the general value of $\theta $is

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• In a triangle $ABC$, if $b=2,\,B=30{}^\circ $then the area of circumcircle of triangle ABC in square units is

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• ${{\tan }^{2}}\theta +{{\cot }^{2}}\theta $is

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