Figure 4 shows a sketch of a child's toy.
The toy consists of a specially weighted wheel that moves along the floor. The diameter if the wheel is 40cm.
An arrow is drawn on the wheel. At the instant when the wheel starts to move, the point of the arrow is 35 cm above the floor.
The wheel takes 2 seconds to complete one revolution.
The height above the ground, h centimetres, of the point of the arrow, t seconds after the wheel starts to move, is modelled by the equation.
h= |Acos(bt+a)°|
How do you find a complete equation for the model giving the exact value of A, the exact value of b, and the value of a to 3 sig fig?
I'm so lost any help would be appreciated