Question

The function f(x)=-3cos(3x+Pi/4) has ___ .

Answer 1

amplitude = 3

period =
`(2\pi )/(3)`

Explanation:

Comparing the equation with the general equation :

`f(x) = A cos(Bx + c ) + D`

Where :

A = amplitude

period =
`(2\pi )/(B)`

D = vertical shift

Therefore : with the comparison :

amplitude = /-3/ = 3

period =
`(2\pi )/(3)`