Two non-collinear unit vector `hata and hatb` are such that `|hata+hatb|=sqrt(3)`. Find the angle between the two unit vectors.

Explanation

`|veca+vecb|=sqrt(3)`
or, `a^2+b^2+2abcostheta=(sqrt(3))^2=3`
`or, cos theta =(3-a^2-b^2)/(2ab)=(3-(1^2-1))/(2*1*1)=1/2= cos 60^@`
`therefore theta =60^@`