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Question: Answered & Verified by Expert
If the direction cosines of two lines are such that $2 l+m+2 n=0$ and $3 l^2+5 m^2-11 n^2=0$, then the angle between the two lines is
MathematicsThree Dimensional GeometryAP EAMCETAP EAMCET 2017 (24 Apr Shift 1)
Options:
  • A $\frac{\pi}{4}$
  • B $\frac{\pi}{3}$
  • C $\frac{\pi}{6}$
  • D $\frac{\pi}{2}$
Solution:
2879 Upvotes Verified Answer
The correct answer is: $\frac{\pi}{2}$
No solution. Refer to answer key.

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