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Find the angle between the lines whose d...

Find the angle between the lines whose direction cosines are given by the equation `l + m + n = 0` and `l^2 + m^2 - n^2 = 0.`

A

`cos^(-1)(2sqrt(3))`

B

`cos^(-1)sqrt(3)`

C

`(phi)/(3)`

D

`(phi)/(2)`

Text Solution

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The correct Answer is:
(c)
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