trigonometry

Related Questions

• Let D be the middle point of the side BC of a triangle ABC. If the triangle ADC is equilateral, then ${{a}^{2}}:{{b}^{2}}:{{c}^{2}}$ is equal to

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• If $A=130{}^\circ $and $x=\sin A+\cos A,$then

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• If $\sin \theta =\frac{-4}{5}$ and $\theta $ lies in the third quadrant, then $\cos \frac{\theta }{2}=$

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• The value of $\cos 52{}^\circ +\cos 68{}^\circ +\cos 172{}^\circ $ is

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• The horizontal distance between two towers is 60 metres and the angular depression of the top of the first tower as seen from the top of the second, is 30°. If the height of the second tower be 150 metres, then the height of the first tower is

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