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The acute angle between two lines such t...

The acute angle between two lines such that the direction cosines l, m, n, of each of them satisfy the equations
`l + m + n= 0 ` and `l^2 + m^2 – n^2 = 0` is:

A

`15^@`

B

`30^@ `

C

`60^@`

D

`45^@`

Text Solution

Verified by Experts

The correct Answer is:
C
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