Chapter 11, Problem 23RE

(a)

To determine

To calculate: For given the vectors:

$u=5\left[\cos \frac{3\pi }{4}i+\sin \frac{3\pi }{4}j\right]$ and $v=2\left[\cos \frac{2\pi }{3}i+\sin \frac{2\pi }{3}j\right]$

Find the angle $\theta$ between the vectors in radians.

(b)

To determine

To calculate: For the vectors $u=5\left[\cos \frac{3\pi }{4}i+\sin \frac{3\pi }{4}j\right]$ and

$v=2\left[\cos \frac{2\pi }{3}i+\sin \frac{2\pi }{3}j\right]$ find The angle $\theta$ between them in degree.