trigonometry

Related Questions

• If $x+y+z={{180}^{o}},$ then $\cos 2x+\cos 2y-\cos 2z$ is equal to

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• If $b\sin \alpha =a\sin (\alpha +2\beta ),$ then $\frac{a+b}{a-b}=$

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• ${{\cos }^{2}}\left( \frac{\pi }{6}+\theta \right)-{{\sin }^{2}}\left( \frac{\pi }{6}-\theta \right)=$

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• Period of $\sin \theta -\sqrt{3}\cos \theta $ is

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• If $\cos 3\theta =\alpha \cos \theta +\beta {{\cos }^{3}}\theta ,$then $(\alpha ,\beta )=$

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