Question 177060
State the amplitude, period, phase shift and vertical translation of the function: 
f(x)= 3cos(2x-3(pie)/4)-1. 
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f(x) = 3cos((1/2)x - (3/4)pi) - 1

a = 3 ; b = 3/2 ; c = (3/4)pi ; d = -1

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amp = 3
period = 2(pi)/b = (2pi)/(3/2) = (4/3)pi
phase shift = c/b = (3/4)pi / (3/2) = (1/2)pi
vert trans: -1
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{{{graph(400,300,-7,7,-5,7,3cos((1/2)x-(3/4)(3.1459))-1)}}}
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Cheers,
Stan H.