Homework Help: Algebra II

Posted by Lucy on Saturday, April 19, 2008 at 11:43am.

State the phase shift of y=cos(theta-[pi/3]). Then graph the function.

I know that you cannot graph on this site but how do I solve for the phase shift and to graph the phase shift, would I first have to graph the current equation?

Thanks.

Algebra II - bobpursley, Saturday, April 19, 2008 at 12:00pm
when is the angle zero?
Theta-PI/3=0
at Theta=PI/3, the consine function ismax, so the phase shift is PI/3 to the LEFT.

It probably would be a good idea to graph the current equation to get the hang of it.

http://www.analyzemath.com/Graphing/GraphSineFunction.html see the shift and angle modifier explaination and example using the sin (ax+c) example

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