Question

Anybody know the answer?

Answer 1

The displacement is found by subtracting the initial position from the position at t=1.

x(1) - x(0) = 4(cos(π+π/4) -cos(π/4))

... = 4(-√2/2 - √2/2)

... = -4√2 ≈ -5.657 . . . meters