Question

Write an equation with phase shift 0 to represent simple harmonic motion with initial position -1/2, amplitude 1/2, and period 4.

I got d=(1/2) sin (pi/2) t + (1/2).

Is this correct?

Answer 1

The initial position (at t=0) is not -1/2

Or is that initial - just a separator?

Also, if you're going to use parentheses, it ought to be

d = 1/2 sin(pi/2 t) - 1/2