Chapter 7, Problem 2P

To determine

(a)

A user-defined MATLAB function for the given math function $r\left(\theta \right)=3\sin \left(3\cos \left(0.5\theta \right)\right)$; the value of $r\left(\text{π/6}\right)$ and $r\left(\text{5π/6}\right)$ using this function. (Write the function such that $\theta$ can be a vector.)

To determine

(b)

To make:

A plot of the given function $r\left(\theta \right)$ for $0\le \theta \le 4\text{π}$.