AIEEE 2004

JEE Main 2004 Mathematics question on Trigonometry

The sides of a triangle are in the ratio 1:3:21 : \sqrt{3} : 2, then the angles of the triangle are in the ratio
  1. A.
    1:3:51 : 3 : 5
  2. B.
    2:3:22 : 3 : 2
  3. C.
    3:2:13 : 2 : 1
  4. D.
    1:2:31 : 2 : 3
Show answer and solution

Correct option: D

Solution

The sides 1 : √3 : 2 correspond to a 30-60-90 triangle (since sin30°=1/2, sin60°=√3/2, sin90°=1). The angles are 30° : 60° : 90°, which simplifies to 1 : 2 : 3.

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