Homework Help: precalculus

Posted by lisa on Monday, November 13, 2006 at 8:21pm.

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

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