Angle Between Vectors

The angle $0180$ between two $n-$dimensional real vectors $u,vin{R}^n$ can be determined through the relationship $cos=\frac{u*v}{||u||||v||},$

where $u*v=u^{T}v={\displaystyle \underset{i=1}{\overset{n}{}}}{u}_i{v}_i$ is the standard dot product and $||u||={\displaystyle \underset{i=1}{\overset{n}{}}}\sqrt[\phantom{2}]{u_i^2}$ is the Euclidean $($or $L_2)$ norm.

Write a function vectorAngle$()$ which takes as input:

u$,n1$ double array

v$,n1$ double array

and returns as output:

theta, the angle in degrees between $u$ and $v($note that the given equation is for $cos())$

Assume $u$ and $v$ are non$-$zero vectors. Do not use loops in your solution.

Example:

$u=[1$;$0$;$0]$

$v=[0$;$1$;$1]$

theta $=$ vectorAngle $(u,v)$

Output:

theta $=$

$90$

IN MATLAB please!