I need help with (b)

A mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface by releasing it from a stretched position. The position of the mass at any time is described by x - (5.7 cm) cos [2xt/ (0.58 s)]. Determine the following. (Where applicable, indicate the direction with the sign of your answer. Assume the mass is initially stretched in the positive direction.) (a) period T of the motion 0.58 S (b) location of the mass at t = 2.6 s --5.6666 X See If you can use the expression for the position of the mass at any time to determine the position of the mass at this specific time. cm (c) location of the mass at t = 2.6 s + T -5.6666 cm Additional Materials