Travis is riding the Ferris wheel at the amusement park. His height can be modeled by the equation H(t) = 22 cospi over 13t + 28, where H represents the height of the person above the ground in feet at t seconds.

Part 1: How far above the ground is Travis before the ride begins?
Part 2: How long does the Ferris wheel take to make one complete revolution?
Part 3: Assuming Travis begins the ride at the top, how far from the ground is the edge of the Ferris wheel, when Travis' height above the ground reaches a minimum?

Question

Travis is riding the Ferris wheel at the amusement park. His height can be modeled by the equation H(t) = 22 cospi over 13t + 28, where H represents the height of the person above the ground in feet at t seconds.

Part 1: How far above the ground is Travis before the ride begins?
Part 2: How long does the Ferris wheel take to make one complete revolution?
Part 3: Assuming Travis begins the ride at the top, how far from the ground is the edge of the Ferris wheel, when Travis' height above the ground reaches a minimum?

anonymous · Answer

can someone help me with ? 2

anonymous · Answer

One cycle of a cosine wave is 2pi.  Since you know the B value, pi/13, just divide (2pi)/(pi/13) to get the time.