Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
itsonlycdeee
Group Title
The equation below gives the height h of a passenger on a Ferris wheel at any time t during the ride to be
h = 137 − 122 cos (π/10)t
where h is given in feet and t is given in minutes. Use this equation to find the times at which a passenger will be 120 feet above the ground during the first revolution.
I found the first time, which is about 4.5, but I'm confused on how to find the second time.
 one year ago
 one year ago
itsonlycdeee Group Title
The equation below gives the height h of a passenger on a Ferris wheel at any time t during the ride to be h = 137 − 122 cos (π/10)t where h is given in feet and t is given in minutes. Use this equation to find the times at which a passenger will be 120 feet above the ground during the first revolution. I found the first time, which is about 4.5, but I'm confused on how to find the second time.
 one year ago
 one year ago

This Question is Closed

robz8 Group TitleBest ResponseYou've already chosen the best response.0
are you familiar with the unit circle? the are 2 quadrants in the unit circle which cos(t) is positive
 one year ago

itsonlycdeee Group TitleBest ResponseYou've already chosen the best response.0
Yes, the 1st quadrant and the 4th quadrant.
 one year ago

robz8 Group TitleBest ResponseYou've already chosen the best response.0
is t inside or outside of the cos?
 one year ago

itsonlycdeee Group TitleBest ResponseYou've already chosen the best response.0
Outside
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.0
Should be inside.
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.0
Well, most likely.
 one year ago

robz8 Group TitleBest ResponseYou've already chosen the best response.0
are you sure?, because then h = 137 − 122 cos (π/10)t would be linear, meaning there is only 1 time h = 120
 one year ago

itsonlycdeee Group TitleBest ResponseYou've already chosen the best response.0
Oh, then inside does make more sense.
 one year ago

robz8 Group TitleBest ResponseYou've already chosen the best response.0
120 = 137 − 122 cos (π/10*t) 17 = 112 cos(π/10*t) 17/112 = cos(pi/10*t) \[\cos^{1} (17/112) = \frac{ \pi }{ 10 }t\]
 one year ago

itsonlycdeee Group TitleBest ResponseYou've already chosen the best response.0
Thank you I just figured it out!
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.