Which of the following have a frequency factor of b = 1?
•a sine function whose period is 2pi radians.
•a sine function whose x-coefficient is 2pi
•a cosine function with no phase shift whose x-coefficient is 1.
•a sine function whose graph shows 2 cycles from - 4pi radians to 0.
•a sine function whose graph shows 2 cycles from 0 to 2pi radians.
•a cosine function whose graph shows 4 cycles from 0 to 4pi radians.
•a cosine function whose graph shows 1 cycle from 3pi radians to 5pi radians.