An angle between the lines whose direction cosines are given by the equations, + 3m + 5n = 0 and 5 m - 2mn +...

Question

An angle between the lines whose direction cosines are given by the equations, + 3m + 5n = 0 and 5 m - 2mn + 6n = 0, is -

Accepted Answer

(B)

JEE Main 2018 Mathematics question