trigonometry

Related Questions

• If ${{\tan }^{2}}\theta =2{{\tan }^{2}}\varphi +1,$ then $\cos 2\theta +{{\sin }^{2}}\varphi $ equals

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• The radius of the incircle of triangle when sides are 18, 24 and 30 cms is

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• If $A+B+C=\pi ,$ then $\frac{\cos A}{\sin B\sin C}+\frac{\cos B}{\sin C\sin A}+\frac{\cos C}{\sin A\sin B}=$

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• If ${{\sin }^{2}}\theta -2\cos \theta +\frac{1}{4}=0,$then the general value of $\theta $is

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• If $\sin 2\theta +\sin 2\varphi =1/2$ and $\cos 2\theta +\cos 2\varphi =3/2$, then ${{\cos }^{2}}(\theta -\varphi )=$

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