The graph shows the position of an oscillating object as a function of time. What is the equation of the graph?
A) \ x(t)=A \\cos (\\omega t+\\phi) \
B) \ x(t)=A \\sin (\\omega t+\\phi) \
C) \ x(t)=A \\cos (\\omega t-\\phi) \
D) \ x(t)=A \\sin (\\omega t-\\phi) \