I have the following math problem:
Kala is jumping rope, and the rope touches the ground every time she jumps. She jumps at the rate of 40 jumps per minute, and the distance from the ground to the midpoint of the rope at its highest point is 5 feet. At t=0, the height of the midpoint is zero. Write a function with phase shift 0 for the height of the midpoint of the rope above the ground after t seconds.
I am not sure whether to use sine or cosine for the function.
I don't know where to begin on this problem. Could someone help? Thanks.