Question

Define unite vector, which unit
vector are used as unit vectors
along x, y, and z axes?​

Answer 1

+j^+k^).(i^+j^)=(3)(2)cosθ  

(1+1)=(3)(2)cosθ  

cosθ=32

θ=cos−1(32)

Using formula, cos−1x=sin−1(1−x2) we will get,

θ=sin−1(1−32)=sin−1(31