trigonometry

Related Questions

• $\frac{\cos 12{}^\circ -\sin 12{}^\circ }{\cos 12{}^\circ +\sin 12{}^\circ }+\frac{\sin 147{}^\circ }{\cos 147{}^\circ }=$

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• The general value $\theta $ is obtained from the equation $\cos 2\theta =\sin \alpha ,$ is

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• $2\sin A{{\cos }^{3}}A-2{{\sin }^{3}}A\cos A=$

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• The general value of $\theta $ satisfying the equation $\tan \theta +\tan \left( \frac{\pi }{2}-\theta \right)=2$, is

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• $\sin 75{}^\circ =$

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