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The angle between the lines whose direc...

The angle between the lines whose direction cosines are given by the equatios `l^2+m^2-n^2=0, m+n+l=0` is

A

`pi//6`

B

`pi//4`

C

`pi//3`

D

`pi//2`

Text Solution

Verified by Experts

The correct Answer is:
C
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