The period of the function y = -4 cos 8x is given by 2π/b, where b is the coefficient of x in the function. In this case, b = 8, so the period is 2π/8 = π/4.
The amplitude of the function y = -4 cos 8x is given by the absolute value of the coefficient of the cosine function, which is 4. So the amplitude is 4.
Find the period and the amplitude of the periodic function.
y = –4 cos 8x
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