Find the angles at which the vector `2 hat i- hat j+2 hat k` is inclined to each of the coordinate axes.

Explanation

A= `2 hat i- hat j+2 hat k`

Thus,

`|A|=sqrt(2^2+1^2+2^2)`

`|A|=3`

So,

angle of coordiante axis are,

`cos^(-1)(2/3),cos^(-1)`
`(-1/2),cos^(-1)(2/3)`