trigonometry

Related Questions

• The angle of depression of a point situated at a distance of 70 metres from the base of a tower is 45°. The height of the tower is

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• In $\Delta ABC,$ if ${{\sin }^{2}}\frac{A}{2},{{\sin }^{2}}\frac{B}{2},{{\sin }^{2}}\frac{C}{2}$ be in H. P. then a, b, c will be in

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• If the length of the sides of a triangle are 3, 4 and 5 units, then R (the circumradius) is

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• If the angles of elevation of two towers from the middle point of the line joining their feet be 60° and 30° respectively, then the ratio of their heights is

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• If $\frac{\pi }{2}<\alpha <\pi ,\,\text{ }\pi <\beta <\frac{3\pi }{2};$ $\sin \alpha =\frac{15}{17}$ and $\tan \beta =\frac{12}{5}$, then the value of $\sin (\beta -\alpha )$ is

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