Mathematics · Three Dimensional Geometry
The angle between the lines whose direction cosines satisfy the equations l + m + n = 0 and 2lm + 2nl - mn = 0 is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 160°
- 2120°✓
- 390°
- 445°
Correct answer
120°
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