trigonometry

Related Questions

• The angle of elevation of a tower at a point distant d meters from its base is 30°. If the tower is 20 meters high, then the value of d is

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• $\frac{1}{\tan 3A-\tan A}-\frac{1}{\cot 3A-\cot A}=$

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• In a $\Delta ABC$ , if ${{b}^{2}}+{{c}^{2}}=3{{a}^{2}}$ , then $\cot B+\cot C-\cot A=$

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• In any triangle $ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=$

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• A vertical pole consists of two parts, the lower part being one third of the whole. At a point in the horizontal plane through the base of the pole and distance 20 meters from it, the upper part of the pole subtends an angle whose tangent is $\frac{1}{2}$. The possible heights of the pole are

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