trigonometry

Related Questions

• $\sin 6\theta +\sin 4\theta +\sin 2\theta =0,$then $\theta =$

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• .$\cos 2(\theta +\varphi )-4\cos (\theta +\varphi )\sin \theta \sin \varphi +2{{\sin }^{2}}\varphi =$

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• If $\sin 2\theta =\cos 3\theta $and $\theta $is an acute angle, then $\sin \theta $is equal to

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• If $\sin A+\cos A=\sqrt{2},$then ${{\cos }^{2}}A=$

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• If $\sin A+\sin 2A=x$ and $\cos A+\cos 2A=y,$ then $({{x}^{2}}+{{y}^{2}})({{x}^{2}}+{{y}^{2}}-3)=$

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