Question

Anybody know the answer?

Answer 1

Since t is from 0 to 1 second, the time length is 1 second total.

replace t in the given equation with 1 and solve for x:

x = 4 cos(PI x 1 + PI/4)

X = 4cos(PI + PI/4)

x = 4cos(5PI/4)

x = 4(-cos(PI/4))

x = -2√2