Okay so I have two problems i would like someone to check for me, i have to determine the amplitude, period, and phase shift of each function. Then i have to graph one period of the function. I don't know how to post my version of a graph here, but these are my calculations for the two equation i want checked so far.

Equation : y = sin (x - PI / 2)

Amplitude: 1

Period: 2 PI

Phase Shift : PI/2

Step: PI/2

X1: PI

X2: 3PI/2

X3: 5PI/2

(This should be 2pi. Your increment is pi/2, which when added to your previous point 3pi/2, gives 4pi/2 = 2pi)

X4: 7PI / 2 (Likewise, this is incorrect)

-----------------------------------------...