TS EAMCET · Maths · Three Dimensional Geometry
If the direction cosines of the two lines satisfy the equations \(l+m+n=0,2 l m+2 l n-m n=0\), then the acute angle between these lines is
- A \(\cos ^{-1}\left(\frac{1}{3}\right)\)
- B \(30^{\circ}\)
- C \(\cos ^{-1}\left(\frac{2}{3}\right)\)
- D \(60^{\circ}\)
Answer & Solution
Correct Answer
(D) \(60^{\circ}\)
Step-by-step Solution
Detailed explanation
The direction cosines of two lines satisfy the equations…
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