Question

What is the amplitude, period, and phase shift of f(x) = -3 cos(4x + π) + 6?

Answer 1

i can only tell you what i think:
The amplitudes of those functions are given by the constant in front of sin or cos!
For example

F(x) has an amplitude of 2
G(x) has an amplitude of 1/2

Now for the period the formula is 2pi/constant next of x

So for first equation period is 2pi/pi = 2
and for second equation period is 2pi/2= pi

Answer 2

Hope that Helps