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If the direction cosines of two lines ar...

If the direction cosines of two lines are given by `l+m+n=0` and `l^2-5m^2+n^2=0`, then the angle between them is

A

`pi/2`

B

`pi/6`

C

`pi/4`

D

`pi/3`

Text Solution

Verified by Experts

The correct Answer is:
D
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