a)a ferris wheeel has a diameter of 22m, and is 1m higher than the ground at its lowest point. the wheel completes one revolution every 15 minutes, write a cosine equation h(t) representing the height a chair is off the ground in metres, as a function of time in minutes, if the chair start at the lowest point.

b) write in sine equation.

c)from a height of 18m or higher, you can see your grandma's house. from how long each revolution can you see your grandms's house. (use the cosine equation)

need some help here guys. Thanks in advance.