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

Question

anonymous · Answer

someone please help i really dont know where to begin

anonymous · Answer

really?? @TheSmartOne you just leave me hangin like that?!

ybarrap · Answer

$$
f(x)=A\sin(\cfrac{2\pi}{T}x+\phi)+b
$$
A is the amplitude
T is the period
$\phi$ is the phase shift
b is the y-intercept
Match up each parameter with your function.

ybarrap · Answer

Note in this case b is the y-intercept, but if the phase was different, this would not be the case. "b" just represents an upward or downward shift of f(x) after you compute the sine part.