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Posted by Peter on Saturday, November 24, 2012 at 6:07pm.

Is the period of f(x) = 2cos(3x - ð) 2ð/3?

ð = pi

one period is from x = 0 to x = 2 pi/3 so that the argument of the trig function changes by 2 pi so the answer is 2 pi/3

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