trigonometry

Related Questions

• If $x+\frac{1}{x}=2\cos \alpha $, then ${{x}^{n}}+\frac{1}{{{x}^{n}}}=$

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• The values of $\theta $ satisfying $\sin 7\theta =\sin 4\theta -\sin \theta $ and $0 < \theta < \frac{\pi }{2}$ are

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• $1-2{{\sin }^{2}}\left( \frac{\pi }{4}+\theta \right)=$

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• The general solution of $\tan 3x=1$ is

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• If $\cos \theta +\cos 2\theta +\cos 3\theta =0$, then the general value of $\theta $ is

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