trigonometry

Related Questions

• If ${{\sec }^{2}}\theta =\frac{4}{3}$, then the general value of $\theta $is

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• The value of $\sin 10{}^\circ +\sin 20{}^\circ +\sin 30{}^\circ +...+$ $\sin 360{}^\circ $ is

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• If $\cos (\theta -\alpha ),\ \cos \theta $and $\cos (\theta +\alpha )$are in H.P., then $\cos \theta \sec \frac{\alpha }{2}$is equal to

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• From an aeroplane vertically over a straight horizontally road, the angles of depression of two consecutive mile stones on opposite sides of the aeroplane are observed to be $\alpba$ and $\beta$, then the height in miles of aeroplane above the road is

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• $\tan 20{}^\circ +\tan 40{}^\circ +\sqrt{3}\tan 20{}^\circ \tan 40{}^\circ =$

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