Problem Statement

Plot the following function for $x$ over the interval $-2x2$

$f(x)=3xco{s}^2(x)-2x$

Additional Instructions

Use a step size or incremental value. of $0\mathrm{.}1$ for $x.$ Add a title to the plot and properly label the axis.

Reference

Problem $20$ from Palm. W$.$ J$.2019$ MATLAB for Engineering Applicetions, $4$th ed$.$ McGrav$-$Hill Education. New York. P$.100.$