clarify: the formula is ?

if so, the amplitude is the absolute value of the coefficient of the sine part of the function.

period: the formula for the period gives the period as

the max occurs when the sine function has a value of 1 and the minimum occurs when it has a value of -1. do you see why?

for the complete cycles it makes, we need to find for what t does it make one revolution, and multiply that by 30.