Answer:
Explanation:
y=- (1/3)cos 3θ
Period: 2π/b= 2π/3 since b=3 here.
Range: The range of a cosine function is always [-1, 1].
Amplitude: amplitude of a cosine function = the absolute value of the coefficient in front of the cosine function. In this case, the coefficient is -(1/3), so the amplitude is |-(1/3)| = 1/3.