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kekeman:

A sine function has an amplitude of 4, a period of π, and a phase shift of pie/2. What is the y-intercept of the function? A.) (0,-2) B.) (0,0) C.) (0,2) D.) (0,4)

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Vocaloid:

transformation of a sin function y = A sin(B(x + C)) + D where A is the amplitude (given as 4), period = 2pi/B, so you'll plug in the period of pi and solve for B and plug it into the function; C is the sin shift (given as pi/2), D is the vertical shift (there's no vertical shift stated so D = 0). plug in the appropriate A, B, and C values and then calculate the y-intercept by plugging in x = 0.

kekeman:

I'm thinking (0,0)

Vocaloid:

good

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