trigonometry

Related Questions

• 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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• A flag-post 20m high standing on the top of a house subtends an angle whose tangent is $\frac{1}{6}$ at a distance 70 m from the foot of the house. The height of the house is

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• The general value of $\theta $ satisfying the equation $\tan \theta +\tan \left( \frac{\pi }{2}-\theta \right)=2$, is

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• The angles of elevation of the top of a tower (A) from the top (B) and bottom (D) at a building of height a are 30° and 45° respectively. If the tower and the building stand at the same level, then the height of the tower is

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• In a triangle $ABC$ , sin$A:\sin B$ : $\sin C=1:2:3$. If $b=4$ cm, the perimeter of the triangle is

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