The cosine of the angle of the triangle with vertices `A(1,-1,2),B(6,11,2)` and `C(1,2,6)` is
Channel: Doubtnut
Date: 2020-05-24

The cosine of the angle of the triangle with vertices `A(1,-1,2),B(6,11,2)` and `C(1,2,6)` is