Question

Trig questions. The answer deadline is up so I cannot submit the answers anymore, but feel free to answer and help out if you can.

A) The figure below is a simplified model of a Ferris wheel with diameter 230 feet. The top of the wheel is 240 feet above the ground. If θ is the central angle formed as a rider moves from position P0 to position P1, find the rider's height above the ground h when θ is 120°.
Diagram: http://prntscr.com/8kn5ag

B) Suppose each edge of the cube shown in the figure is 9.00 inches long. Find the measure of the angle formed by diagonals CF and CH. Round your answer to the nearest tenth of a degree.
Diagram: http://prntscr.com/8lbcvd
**Variable version: Suppose each edge of the cube shown in the figure is x inches long. Find the measure of the angle formed by diagonals DE and DG. Round your answer to the nearest tenth of a degree. Diagram http://prntscr.com/8lbe3e

Answer 1

Okay give me some minutes to figure out the solution

Answer 2

Alright

Answer 3

There is an issue with showing how many users are actually viewing this question. Lol

Answer 4

Almost finished

Answer 5

Gotcha

Answer 6

Take your time, I've got other problems to work on in the meantime :)

Answer 7

@Hero I may be able to solve question A. Are you okay with helping me solve the other two questions?

Answer 8

scratch that I got stuck

Answer 9

I thought I'd be able to solve this but I haven't worked with it in a While and It's very late here. I don't know why you wait until now to want to do this We and have done it at any point during the day.

Answer 10

I just woke up an hour ago. Lol

Answer 11

I'm going to post the solution but it will take a bit longer Just be patient please.

Answer 12

Okay

Answer 13

i think B can be answered using vectors...

Answer 14

The deadline for the question submission is up.

Answer 15

if u set it up so that the cube lies in the first octant with C at the origin, then CH = <9,9,0> and CF is <9,9,9>

Answer 16

oh

Answer 17

No, go ahead. I would still like to know the answer.

Answer 18

...except this class has not taught vectors yet.
I do know vectors, but the class hasn't taught us vectors yet.

At least I don't think they have... But you can proceed. I know vectors so I'll just use vectors :p

Answer 19

oh ok... then never mind. But the next step would be to use "dot product" in case you are curious. its a formula that allows us to find the angle between any two vectors. you will definitely come across it :)

Answer 20

No it's okay go ahead

Answer 21

I forgot how to dot-product actually... it's been two years ^^;

Answer 22

if you have two vectors A=<a1,a2,a3> and B=<b1,b2,b3> then the dot product of A and B
is (a1b1+a2b2 + a3b3) OR (magnitude of A)(magnitude of B)(
cosine of angle between them)

so,
\[81+81+0= \sqrt{9^2 +9^2 +0} \times \sqrt{9^2 +9^2 +9^2}\times \cos(\theta)\]

Answer 23

solve for theta
35.2 degrees

Answer 24

does it match with the answer you got?

Answer 25

Um... I was working on my psych homework lol
I might have to go, so if you wanna do this tomorrow?

Answer 26

no prob

Answer 27

Thanks :D

Answer 28

I have the solution. I will post in five minutes Or less.

Answer 29

Hero, take your time. My answer submission form is already expired so I am fine with waiting however line for the solution. :]

Answer 30

Well, the solution is for part A that's all I have time for sorry.

Answer 31

however long*

Okay that's fine you can do it later :]

Answer 32

You can do B without vectors quite simply as well,