If `hati,hatj` and `hatk` represent unit vectors along the x,y and z-axes respectively,
Channel: Doubtnut
Date: 2020-02-02

If `hati,hatj` and `hatk` represent unit vectors along the x,y and z-axes respectively, then the angle `theta` between the vectors `(hati+hatj+hatk)` and `(hati+hatj)` is equal to :