For the function given, state the starting point for a sample period: ƒ(t) = 0.2sin (t − 0.3) + 0.1

The graph of this function is shown in the figure below. The general form of a sine wave is given by:



A: The amplitude.

f : The ordinary frequency, the number of oscillations (cycles) that occur each second of time.

ω = 2πf, the angular frequency, the rate of change of the function argument in units of radians per second

B = the displacement in y-axis

= the phase, specifies (in radians) where in its cycle the oscillation is at t = 0.

The period is given by:



Therefore:



And givent that , then , 

Finally, the starting point for a sample period occurrs when

The answer is the first one