Mathematics · 3D Geometry and Direction Cosines
The angle between two lines whose direction cosines l, m, n satisfy the equations l + m + n = 0 and 2l2 + 2m2 - n2 = 0 is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 130°
- 290°
- 3180°
- 460°✓
Correct answer
60°
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