Mathematics

The angles of depression of point A from points D and E respectively are :

  1. 30° and 60°

  2. 45° and 30°

  3. 45° and 60°

  4. 15° and 60°

The angles of depression of point A from points D and E respectively are : Model Question Paper - 3, Concise Mathematics Solutions ICSE Class 10.

Heights & Distances

1 Like

Answer

For point A,

Angle of depression from point D = 90° - ∠D = 90° - 45° = 45°.

In △ ABE,

⇒ ∠A + ∠B + ∠E = 180°

⇒ 60° + 90° + ∠E = 180°

⇒ 150° + ∠E = 180°

⇒ ∠E = 180° - 150° = 30°.

Angle of depression from point E = 90° - ∠E = 90° - 30° = 60°.

Hence, Option 3 is the correct option.

Answered By

1 Like


Related Questions