trigonometry

Related Questions

• The values of $\theta $ satisfying $\sin 7\theta =\sin 4\theta -\sin \theta $ and $0 < \theta < \frac{\pi }{2}$ are

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• If $\tan \alpha =\frac{1}{7},\ \tan \beta =\frac{1}{3},$then $\cos 2\alpha =$

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• The angle of elevation of the top of a tower from a point 20 metre away from its base is 45°. The height of the tower is

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• The solution of the equation $\begin{vmatrix} {\cos \theta } & {\sin \theta }&{\cos \theta }\\ { - \sin \theta }&{\cos \theta }&{\sin \theta }\\ { - \cos \theta }&{ - \sin \theta }&{\cos \theta } \end{vmatrix} = 0$ , is

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• If the sides of a triangle are in ratio 3 : 7 : 8, then R : r is equal to

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