SOLUTION: 5) Find the period of f(x) = 3 - 2cos(3x+pi) a) 2 pi / 3 b) Pi / 3 c) Pi / 6 d) Pi e) 2 pi

Question 121954: 5) Find the period of f(x) = 3 - 2cos(3x+pi)
a) 2 pi / 3
b) Pi / 3
c) Pi / 6
d) Pi
e) 2 pi
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

The general form of cosine is:

where the period

So for the trig function which also looks like . Notice how matches up with , so which means

Now simply plug in into the period formula

So the period is

So the answer is A)
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