A weight is suspended from a spring and allowed to hang at its rest posistion. it is then pulled down 2 in.,released, and allowed to oscillate up and down. its location (in inches) relative to its rest posistion is given by the function f(t)=2sin(2.5t-pie/2), where t is the time in seconds. how much time will it take for the weight to move through one complete cycle of motion?
1 )2.5 sec
2)3.1sec
3)3.8sec
4)5.0sec