# precalculus

posted by
**lisa** on
.

graph y=sin(x-pie/4) (couldn't find pie sign on my keyboard)

Use 3.1459

We can't draw graphs for you here, but you can certainly make a table of values of x and corresponding values of y, and draw the graph yourself. you might save a little time by recognizing that

sin (x - pi/4) =

[(sqrt 2)sin x]/2 - [(sqrt 2)cos x]/2

When x = pi/4, y = 0.

When x=0, y = -(sqrt 2)/2

You can also just plot a sine wave on shifted coordinates, treating x = pi/4 y = 0 as the new origin