trigonometry

Related Questions

• If ${{\cos }^{2}}A+{{\cos }^{2}}C={{\sin }^{2}}B,$ then $\Delta ABC$ is

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• If $\cos 2\theta +3\cos \theta =0$, then the general value of $\theta $ is

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• $\frac{{{\sin }^{2}}A-{{\sin }^{2}}B}{\sin A\cos A-\sin B\cos B}=$

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• The value of $2({{\sin }^{6}}\theta +{{\cos }^{6}}\theta )-3({{\sin }^{4}}\theta +{{\cos }^{4}}\theta )+1$ is

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• If $\tan \alpha =\frac{1}{7}$and $\sin \beta =\frac{1}{\sqrt{10}}\left( 0<\alpha ,\,\beta <\frac{\pi }{2} \right)$, then $2\beta $is equal to

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