trigonometry

Related Questions

• The value of $\sin {{47}^{o}}+\sin 61{}^\circ -\sin 11{}^\circ -\sin 25{}^\circ =$

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• $\tan \left( \frac{\pi }{4}+\theta \right)-\tan \left( \frac{\pi }{4}-\theta \right)=$

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• If $|k|\,=5$and ${{0}^{o}}\le \theta \le {{360}^{o}}$, then the number of different solutions of 3$\cos \theta +4\sin \theta =k$ is

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• The value of $\cos 12{}^\circ +\cos 84{}^\circ +\cos 156{}^\circ +\cos 132{}^\circ $ is

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• $\cot \frac{A+B}{2}$. $\tan \frac{A-B}{2}=$

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