trigonometry

Related Questions

• $\tan 20{}^\circ \tan 40{}^\circ \tan 60{}^\circ \tan 80{}^\circ =$

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• The angle of elevation of a tower from a point A due south of it is 30° and from a point B due west of it is 45°. If the height of the tower be 100 metres, then AB =

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• Period of $\frac{\sin \theta +\sin 2\theta }{\cos \theta +\cos 2\theta }$ is

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• The expression $2\cos \frac{\pi }{13}.\cos \frac{9\pi }{13}+\cos \frac{3\pi }{13}+\cos \frac{5\pi }{13}$ is equal to

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• If $\cos P=\frac{1}{7}$ and $\cos Q=\frac{13}{14},$ where P and Q both are acute angles. Then the value of $P-Q$ is

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