Saved Bookmarks
| 1. |
If α, β, γ are the angles that a line makes with the positive direction of x, y, z axis, respectively, then the direction cosines of the line are.(A) sin α, sin β, sin γ (B) cos α, cos β, cos γ(C) tan α, tan β, tan γ (D) cos2 α, cos2 β, cos2 γ |
|
Answer» (B) is the correct answer. |
|