Question

the anle theta between the vector p =i+j+k and unit vector along x axis​

Answer 1

Answer

Explanation:

Using formulae

a. b=|a|•|b|costheta

Cos theta=a.b/|a|•|b|

=(I+j+k) •i/√3×1

=1/√3

Theta=cos-1(1/√3)