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…

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
  1. $\frac{\pi}{4}$
  2. $\frac{\pi}{3}$
  3. $\frac{\pi}{6}$
  4. $\frac{\pi}{2}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (24 Apr Shift 1)

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