trigonometry

Related Questions

• In any triangle $AB=2,BC=4,CA=3$ and D is mid point of BC, then

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• If $A+B+C=\frac{3\pi }{2},$ then $\cos 2A+\cos 2B+\cos 2C=$

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• The maximum value of the function $f(x)=3\sin x+4\cos x$ is

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• If $\sin \theta +\sin 2\theta +\sin 3\theta =\sin \alpha $ and $\cos \theta +\cos 2\theta +\cos 3\theta =\cos \alpha $, then $\theta$ is equal to

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• If $\cos (\theta -\alpha ),\ \cos \theta $and $\cos (\theta +\alpha )$are in H.P., then $\cos \theta \sec \frac{\alpha }{2}$is equal to

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