Mathematics 27 Online
OpenStudy (anonymous):

Find the exact solutions to each equation for the interval 0<=x<2pi. 2cos^2 x-3 cos x+1=0

myininaya (myininaya):

hey yotis the question before they missed a solution

myininaya (myininaya):

let u=cosx 2u^2-3u+1=0 2u^2-2u-u+1=0 2u(u-1)-(u-1)=0 (u-1)(2u-1)=0 u=1 u=1/2 but remember u=cosx cosx=1 so x=0,2pi cosx=1/2 so x=pi/3, 5pi/3

OpenStudy (anonymous):

so theirs four solutions to this one?

myininaya (myininaya):

we don't include 2pi if x<2pi

myininaya (myininaya):

we include 2p if x<=2pi

OpenStudy (anonymous):

so its just 0, pi/3 and 5pi/3 ?

myininaya (myininaya):

yes! :)

OpenStudy (anonymous):

alright, thanks.

OpenStudy (anonymous):

haha that pic is pretty gay ill admit it but yeah i linked it to my facebook.

myininaya (myininaya):

oh i was going to say u guys look cute (dont worry im not a guy)

OpenStudy (anonymous):

haha thanks

myininaya (myininaya):

lol

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
abound: Wow question cove really fell off
5 minutes ago 5 Replies 1 Medal
ayden09: chat i love black pink hehe i like jones to
15 hours ago 19 Replies 2 Medals
kamani7676: help
21 hours ago 5 Replies 1 Medal
kamani7676: Help
21 hours ago 76 Replies 2 Medals
sigmasimmymind: need help
51 minutes ago 10 Replies 2 Medals
notmeta: (communication unit) help??????????????
23 hours ago 3 Replies 0 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!