Question

A particle moves along the x-axis so that at any time t, measured in seconds, its position is given by s(t) = 4sin(t) - cos(2t), measured in feet. What is the acceleration of the particle at time t = 0 seconds?

Answer 1

sub in 0 for every where you see variable "t". Your answer should be -1. 4sin(0) = 0 and cos(2 x 0) = 1. Therefore, you do 0 - 1 which is -1.