trigonometry

Related Questions

• A tower subtends an angle of 30° at a point distant d from the foot of the tower and on the same level as the foot of the tower. At a second point h vertically above the first, the depression of the foot of the tower is 60°. The height of the tower is

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• If $b=3,c=4$ and $B=\frac{\pi }{3}$ , then the number of triangle that can be constructed is

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• If $A={{\cos }^{2}}\theta +{{\sin }^{4}}\theta ,$ then for all values of $\theta$

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• $\cos 1{}^\circ +\cos 2{}^\circ +\cos 3{}^\circ +.....+\cos 180{}^\circ =$

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• A person standing on the bank of a river observes that the angle subtended by a tree on the opposite bank is 60°. When he retires 40 meters from the bank, he finds the angle to be 30°. The breadth of the river is

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