1) Determine the period of the function in exact terms of pi: y = 6 sin (10x)

2) Determine the period of the function in exact terms of pi: y = 7 sin (x/3)

3) If the period of a sinusoidal function is equal to 18, which of the following gives its frequency?

a) π/9
b) 18π
c) π/18
d) 6π

4) When the period of a sine function doubles, the frequency

a) doubles
b) increases by 2
c) is halved
d) decreases by 2