AP EAMCET · Maths · Three Dimensional Geometry
If the direction cosines of two lines are given by \(l+m+n=0\) and \(l^2-5 m^2+n^2=0\), then the angle between them is
- A \(\frac{\pi}{2}\)
- B \(\frac{\pi}{6}\)
- C \(\frac{\pi}{4}\)
- D \(\frac{\pi}{3}\)
Answer & Solution
Correct Answer
(D) \(\frac{\pi}{3}\)
Step-by-step Solution
Detailed explanation
Given direction cosines of two lines are \[ \begin{aligned} & l+m+n=0 \\ & \quad l^2-5 m^2+n^2=0 \end{aligned} \] and Also,…
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