Mathematics

Problem

In Exercises 13 and 14, find (a) the direction angles of

\mathbf{u}

and

\mathbf{v}

and (b) the angle between

\mathbf{u}

and

\mathbf{v}

. 13.

\mathbf{u}=\langle 4,3\rangle, \mathbf{v}=\langle 2,5\rangle