- A6.5 m
- B6 m
- C13 m
- D36 m
Step-by-Step Solution
If the elevation from the near point is α, the elevation from the far point is 90° − α. Then tanα = and tan(90° − α) = cotα = , so , giving and m.
Answer: B) 6 m
The angles of elevation of the top of a vertical tower from two points on the ground, 4 m and 9 m from its foot and in the same straight line with it, are complementary. The height of the tower is:
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An aeroplane flying horizontally at a height of 1500√3 m is seen at an elevation of 60°…From the top of a 150 m high cliff, the angle of depression of a boat sailing straight…The value of [cos(90° − θ)·secθ·tanθ] ÷ [cosec(90° − θ)·sin(90° − θ)·cot(90° − θ)] is:If A, B and C are the three angles of a triangle, then sin((B + C)/2) equals:If sinθ = 12/13 and θ is acute, the value of cosecθ + cotθ is: