Math homework help??!?

Posted on 2015-10-19 06:09:00 in Math by STIFEN

The problem tells me to graph one period of the function y=3sec(2?x-?)-2
I know that I need the phase shift(or the c) to determine if the graph shifts left or right, and also where the graph starts.

Would the phase shift be -1/2, -1, or ??
1.) 3cos(2?(x-1/2))-2........-1/2
2.) 3cos(?(2x-1))-2...........-1
3.) ...or y=cos(x-c)........?
Which one is correct?

Please help me find the phase shift and vertical shift for this function>__<;

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