Question

I need help how do i determine the phase shift when i am given a graph, i need it for sinusoidal function. I know how to figure everything except phase shift(d)?

Answer 1

Phase shift can be easily read from the graph, by observing how much the graph has shifted to the left or right of its standard position. If it is to the left phase shift is negative and if it is to the right it is positive.

Consider the sinusoidal function sin x. Its standard position is at x=0 that is at (0,0). Now if the graph is not passing through (0,0), it has a phase shift. Read the point on the x axis through which it is passing instead of (0,0). That is the phase shift.