Question:medium

Direction cosines satisfy \(l-2m+n=0\), \(2l^2-3m^2+n^2=0\). Angle between lines is

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If dot product becomes 0 → angle is \(90^\circ\).

Updated On: Jun 22, 2026

\(\frac{9}{\sqrt{105}}\)
\(\frac{3\sqrt3}{\sqrt7}\)
\(\frac{\pi}{2}\)
\(\frac{\pi}{4}\) \bigskip

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The Correct Option is C

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