Respuesta :

Ok, here we have this, for f(x)=A*g(Bx-C)+D, where g(x) is one of the trigonometric basic functions, C/B is called a phase shift, so if we work, we get this:

2cos(3x+2pi)+1

f(x)=2cos(3x+2pi)+1

g(Bx-C)=cos(3x+2pi), B=3, C=-2pi, D=1

Then, the phase shift is: C/B= -2PI/3

So, the correct answer is D.

RELAXING NOICE
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