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From the top of a tower in Patna, the angle of depression of a rickshaw standing on the straight road below is 30°.
At the same moment, the angle of elevation of the top of the tower as seen by the rickshaw driver is:

Class 10Heights and DistancesTrigonometry
  • A30°
  • B60°
  • C45°
  • D90°

Step-by-Step Solution

The horizontal line through the top of the tower is parallel to the horizontal ground, and the line of sight is a transversal, so the angle of depression and the angle of elevation are equal alternate angles: both are 30°.
Answer: A) 30°

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