trigonometry

Related Questions

• If $x{{\sin }^{3}}\alpha +y{{\cos }^{3}}\alpha =\sin \alpha \cos \alpha $ and $x\sin \alpha -y\cos \alpha =0,$ then ${{x}^{2}}+{{y}^{2}}=$

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• If $\sqrt{3}\tan 2\theta +\sqrt{3}\tan 3\theta +\tan 2\theta \tan 3\theta =1$, then the general value of$\theta $ is

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• The shadow of a tower standing on a level ground is found to be 60 m longer when the sun's altitude is 30° than when it is 45°. The height of the tower is

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• The radius of the circle whose arc of length $15cm$ makes an angle of 3/4 radian at the centre is

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• If $\sin x+{{\sin }^{2}}x=1$, then the value of ${{\cos }^{12}}x+3{{\cos }^{10}}x+3{{\cos }^{8}}x+{{\cos }^{6}}x-2$ is equal to

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