If `vecb` and `vec c` be the intersecting face-diagonals of a cube of edge a in the planes XOY and
Channel: Doubtnut
Date: 2021-11-02

If `vecb` and `vec c` be the intersecting face-diagonals of a cube of edge a in the planes XOY and YOZ respectively with respect to a frame of reference erected at the point of intersection of the vectors and edges of the cube as the axes, find (a) the components of the vector `vecd`, where `vecd=vecbxxvec c` and (b) the values of `vecb.vec c` and `vecd.vec c`.