trigonometry

Related Questions

• $\frac{\sin (B+A)+\cos (B-A)}{\sin (B-A)+\cos (B+A)}=$

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• In $\Delta ABC,$ ${{a}^{2}}+{{b}^{2}}+{{c}^{2}}=ac+ab\sqrt{3},$ then triangle is

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• If $\alpha =22{}^\circ 30',$then $(1+\cos \alpha )(1+\cos 3\alpha )$ $(1+\cos 5\alpha )(1+\cos 7\alpha )$ equals

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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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• If $(1+\sin A)(1+\sin B)(1+\sin C)=(1-\sin A)(1-\sin B)(1-\sin C),$then each side is equal to

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