The diection cosines of two lines are proportional to `(2,3,-6) and (3,-4,5),` then the acute angle
Channel: Doubtnut
Date: 2020-04-12

The diection cosines of two lines are proportional to `(2,3,-6) and (3,-4,5),` then the acute angle between them is (A) `cos^-1{49/36}` (B) `cos^-1 {(18sqrt(2))/35}` (C) `96^0` (D) `cos^-1(18/35)`