91Ó°ÊÓ

A Ferris wheel has a radius of 10 m, and the bottom of the wheel passes 1 m above the ground. If the Ferris wheel makes one complete revolution every 20 s, find an equation that gives the height above the ground of a person on the Ferris wheel as a function of time. (Figure cant copy)

Circadian rhythms are biological processes that oscillate with a period of approximately 24 h. That is, a circadian rhythm is an internal daily biological clock. Blood pressure appears to follow such a rhythm. For a certain individual the average resting blood pressure varies from a maximum of 100 mmHg at 2:00 p.m. to a minimum of 80 mmHg at 2:00 a.m. Find a sine function of the form $$f(t)=a \sin (\omega(t-c))+b$$ that models the blood pressure at time \(t,\) measured in hours from midnight.

Solving Trigonometric Equations Graphically Find all solutions of the equation that lie in the interval \([0, \pi]\). State each answer rounded to two decimal places. $$\cos x=0.4$$