Not sure if this is right forum, but hopefully is.
The height, h centimeters, of a bicycle pedal above the ground at time t seconds is given by the equation:
(a) Calculate the maximum and minimum heights of the pedal
(b) Find the first two positive values of t for which the height of the pedal is 43 cm.
(c) How many revolutions does the pedal make in one minute?
To calculate the max and min, the differential would equal 0 and to determine
if the point is a max or a min, the second differential would be positive or neg?
I know that the differential of cos is -sin, but how do I differentiate something like this?
Also, how do I go about 'c' for that matter?