TS EAMCET · Maths · Three Dimensional Geometry
If the direction ratios of two lines are given by \(a+2 b+c=0\) and \(11 b c+6 c a-14 a b=0\). then the angle between these lines is
- A \(\frac{\pi}{3}\)
- B \(\cos ^{-1}\left(\frac{1}{3}\right)\)
- C \(\cos ^{-1}\left(\frac{2}{3}\right)\)
- D \(\frac{\pi}{2}\)
Answer & Solution
Correct Answer
(D) \(\frac{\pi}{2}\)
Step-by-step Solution
Detailed explanation
We have, \[ \begin{aligned} & a+2 b+c=0 \\ & 11 b c+6 c a-14 a b=0 \end{aligned} \] From Eqs. (i) and (ii), we get…
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