Task $9*$

Create a script which calculates the following functions within a specified range:

$y_1=2sin(x),y_2=0\mathrm{.}5cos(x)$

a$)$ Prompt the user for the start and end range of a time variable. Use the entered values to create an evenly spaced vector $x$ with $1000$ elements.

b$)$ Plot both functions within one figure and add appropriate labels.

c$)$ Prepare the plot for black$-$and$-$white printing.