trigonometry

Related Questions

• If $A+B+C=\pi ,$ then ${{\tan }^{2}}\frac{A}{2}+{{\tan }^{2}}\frac{B}{2}+$${{\tan }^{2}}\frac{C}{2}$ is always

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• If $5\tan \theta =4,$ then $\frac{5\sin \theta -3\cos \theta }{5\sin \theta +2\cos \theta }=$

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• $ABCD$ is a rectangular field. A vertical lamp post of height 12m stands at the corner A. If the angle of elevation of its top from B is ${{60}^{o}}$ and from C is ${{45}^{o}}$, then the area of the field is

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• The equation $3\cos x+4\sin x=6$has

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

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