trigonometry

Related Questions

• If in a triangle ABC side $a=(\sqrt{3}+1)$ cms and $\angle B={{30}^{o}},$ $\angle C={{45}^{o}}$ , then the area of the triangle is

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• $\frac{1}{\sin 10{}^\circ }-\frac{\sqrt{3}}{\cos 10{}^\circ }$=

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• .$\cos 2(\theta +\varphi )-4\cos (\theta +\varphi )\sin \theta \sin \varphi +2{{\sin }^{2}}\varphi =$

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• If $\cos (\alpha +\beta )=\frac{4}{5},\sin (\alpha -\beta )=\frac{5}{13}$ and $\alpha ,\beta $ lie between 0 and $\frac{\pi }{4},$then $\tan 2\alpha =$

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• The base of a cliff is circular. From the extremities of a diameter of the base the angles of elevation of the top of the cliff are 30° and 60°. If the height of the cliff be 500 metres, then the diameter of the base of the cliff is

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