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Mathematics · 2014
JEE Main 2014 · 2014-04-06 Offline · Q84
The angle between the lines whose direction cosines satisfy the equations l+m+n=0 and l^2=m^2+n^2 is:
The angle between the lines whose direction cosines satisfy the equations $\displaystyle l+m+n=0$ and $\displaystyle l^2=m^2+n^2$ is :
Official answer
(3)
$\displaystyle \frac{\pi}{3}$
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JEE Main 2014 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.