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Trigonometry: 17.03.2021

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Question 1

At a point on a horizontal line through the base of a monument, the angle of elevation of the top of the monument is found to be such that its tangent is . On walking 138 metres towards the monument the secant of the angle of elevation is found to be The height of the monument (in metre) is

Question 2

From the top of a building, 60 m high, the angles of depression of the top and bottom of a tower are observed to be and . Thus, the height of the tower is

Question 3

Two men are on opposite sides of a tower. They measure the angles of elevation of the top of the tower as 30o and 45o, respectively. If the height of the tower is 50 m, find the distance between the two men.

Question 4

If (1 + tan1o) . (1 + tan2o) . (1 + tan3o) …… (1 + tan44o) = 2n, then n will be

Question 5

The value of   is

Question 6

The simplified value of is

Question 7

The value of sin10°.sin50°.sin70° is equal to 

Question 8

The value of will be

Question 9

Question 10

The value of is equal to
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