Question

The function f(x) = -3cos(3x+ x/4 ) has amplitude of what

Answer 1

amplitude = 3

Explanation:

The standard form of a cosine function is

f(x) = a cos(bx + c) + d

amplitude = | a |, period =
`(2\pi )/(b)`

phase shift = -
`(c)/(b)`, d is the vertical shift

Given the above function, then

amplitude = | - 3 | = 3