Question

What is the period and amplitude for `y=sin(2x)`?

Answer 1

You can "read" these information from the numbers in your equation:
`y=1*sin(2x)`
`1` is the amplitude meaning that your function is oscillating between `+1 and -1`;
`2` is used to evaluate the period as: `period=(2pi)/color(red)(2)=pi` so that one complete oscillation of your sine function is "squeezed" inside the interval `0` to `pi`.