Find the specified quantity.
-Find the amplitude of $y = - 2 \cos ( 4 x - \pi )$.
A) $- 8$
B) $\pi$
C) 4
D) 2

Name: Find the specified quantity. -Find the amplitude of $y = - 2 \cos ( 4 x - \pi )$. A) $- 8$ B) $\pi$ C) 4 D) 2
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Quizplus · Accepted Answer

The amplitude of a trigonometric function like $y = -2\cos(4x - \pi)$ is the absolute value of the coefficient in front of the cosine function, which in this case is |-2| = 2.

Find the Specified Quantity y=−2cos⁡(4x−π)y = - 2 \cos ( 4 x - \pi )y=−2cos(4x−π)

Find the Specified Quantity $y = - 2 \cos ( 4 x - \pi )$