trigonometry

Related Questions

• If $\cos x+{{\cos }^{2}}x=1,$then the value of ${{\sin }^{2}}x+{{\sin }^{4}}x$ is

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• If $\sin \theta =\frac{12}{13},(0<\theta <\frac{\pi }{2})$ and $\cos \varphi =-\frac{3}{5},\left( \pi <\varphi <\frac{3\pi }{2} \right)$. Then $\sin (\theta +\varphi )$will be

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• In $\Delta ABC$ , $(b-c)\cot \frac{A}{2}+(c-a)\cot \frac{B}{2}+(a-b)$ $\cot \frac{C}{2}$ is equal to

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• A vertical pole (more than 100 m high) consists of two portions, the lower being one-third of the whole. If the upper portion subtends an angle ${{\tan }^{-1}}\frac{1}{2}$ at a point in a horizontal plane through the foot of the pole and distance 40 ft from it, then the height of the pole is

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• At a point on the ground the angle of elevation of a tower is such that its cotangent is 3/5. On walking 32 metres towards the tower the cotangent of the angle of elevation is 2/5. The height of the tower is

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