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OpenStudy (anonymous):
Which of the following trigonometric equations meets the criteria given? A = -2, period =pi/4, phase shift = -(pi/2) y = -2cos4(x -pi/2) y = -2cos4(x +pi/2) y = -2cos8(x +pi/2)
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OpenStudy (anonymous):
I know it is one of the last two because the phase shift is negative
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