What is the amplitude, period, and phase shift of f (x) = - 4 sin (2x+3.14) - 5

Remember this: for a trig function of y = A sin (Bx + C) + D

amplitude is A

period is 2π/B

phase shift is - C/B

vertical shift is D

So the amplitude is - 4, the period is π and the phase shift is - 3.14/2 = 1.57.