Try another version of this question Give the equation of the function graph below.
`f(x) = `
Get help: Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question `3cos((pi/2)(x+1))` or `3sin((pi/2)(x-2))` or another equivalent function