posted by Jon .
Write an equation of the cosine function with amplitude 2, period pi, phase shift pi/4.
I got it wrong
The general equation of such cosine function is:y=acos(x-phasedifference),
Therefore, the equation can be written as: y=2cos[x-(pi/4)]..........(a)
Mathematically, equation (a) is suitable
Physically, equation (b) is suitable