trigonometry

Related Questions

• If $\sin \theta +\cos \theta =x,$ then ${{\sin }^{6}}\theta +{{\cos }^{6}}\theta =\frac{1}{4}[4-3{{({{x}^{2}}-1)}^{2}}]$ for

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• In a triangle $ABC,$ if $a\sin A=b\sin B$ , then the nature of the triangle

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• If $\cos \theta =\frac{3}{5}$and $\cos \varphi =\frac{4}{5},$where $\theta $and $\varphi $are positive acute angles, then $\cos \frac{\theta -\varphi }{2}=$

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• In a $\Delta ABC$ $a,\ c,A$ are given and ${{b}_{1}},\ {{b}_{2}}$ are two values of the third side b such that ${{b}_{2}}=2{{b}_{1}}$. Then $\sin A=$

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• The angle of elevation of a cliff at a point A on the ground and a point B, 100 m vertically at A are $\alpha$ and $\beta$ respectively. The height of the cliff is

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