If a line makes angles 90°, 60° and 30° with the positive direction of x, y and z-axes respectively, find its direction cosines. A. 0, 1/2, √3/2 B. 0, √3/2, 1/2 C. 1, 1/2, √3/2 D. 0, 1/2, 1/2 Answer: A) 0, 1/2, √3/2 Explanation: Direction cosines are l = cos 90° = 0, m = cos 60° = 1/2, n = cos 30° = √3/2.

imo class 12 three dimensional geometry

If a line makes angles 90°, 60° and 30° with the positive direction of x, y and z-axes respectively, find its direction cosines.

VAVidaara Admin Asked 6d ago 0 views 0 answers

If a line makes angles 90°, 60° and 30° with the positive direction of x, y and z-axes respectively, find its direction cosines.

Answer: A) 0, 1/2, √3/2

Explanation: Direction cosines are l = cos 90° = 0, m = cos 60° = 1/2, n = cos 30° = √3/2.