Need help with problem 61 pls

Differentiate. hGx) = In (x-VrteY)

Aeolian dunes are sand dunes formed from wind depositing the sand in linear patterns whose cross sections are sinusoidal. The study of deposition patterns show that dunes around Grand Marais have dune ripples that crest 79 feet above Lake Superior and depressions that are 30 feet lower than the crest of the dune. The distance between one dune crest and the next dune crest is 60 feet. What is the trigonometric function that models the height of the dunes around Grand Marais?

10. The pendulum of a Grandfather clock completes 20 cycles/minute. It moves a horizontal distance of 30 cm. Write a sinusoidal function which expresses the movement of the pendulum assuming the pendulum starts at the farthest left position at the beginning. 30