A community for students.
Here's the question you clicked on:
 0 viewing
berrypicking
 2 years ago
solve equation in the interval from 0 to 2pi.
7 cos 2t =3
berrypicking
 2 years ago
solve equation in the interval from 0 to 2pi. 7 cos 2t =3

This Question is Closed

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0corrections 7 cos 2t=3

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1arccos 3/7  your calculator will give u the value of t in first quadrant the other value is in 4th quadrant

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0what does arccos mean

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0am I setting calculator in rad. or degrees

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1oh  then find angle whose cos is 3/7 0 calculator will give you value of 2t in first quadrant

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1right  set to rad arccos means the angle whose cos is given value or  on calculator button this might be cos 1

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0cos 3/7= .91 now what

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0how do I get the other value

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1you need cos1 not cos check again : i make it 1.128 rad

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0ok that is 1.099??

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0and how do you know I need cos1 and not cos?

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1no  the cosine of the angle 2t = 3/7 you need to find the angle whose cosine is 3/7 first find 3 / 7 on ur calculator then you need to press the cos1 (or arccos) button

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0do I just press cos then 1

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1cos1 does not mean 1 / cos in this context

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1no there is probably a button marked cos but you first press the shift key then cos button to get value of the angle

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1cos1 notation is a bit confusing  in Europe they use arccos which makes more sense

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0cos (3/7)=.91. Do I press shift key before entering cos (3/7)? don't know the shift key

berrypicking
 2 years ago
Best ResponseYou've already chosen the best response.0I haven't done any problems with cos1

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1calculators vary you either press shift cos (3/7) or (3/7) shift cos

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1the correct value is 1.127 (to 3 dec places)

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1its a bit hard to explain without seeing your calculator....
Ask your own question
Sign UpFind more explanations on OpenStudy
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.