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Pre Cal.

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State the amplitude, period, and phase shift of the function y=-3cos(3x+ (3pi/2))

Amplitude: 3
Period: 2pi/3
Phase Shift: -pi/2

Am I right?

  • Pre Cal. - ,

    yes

    Although I would personally like to see it written as
    y = -3cos 3(x + pi/2)

    that way the phase shift sort of hits you in the face.

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