Trig help (1 Viewer)

[karoooh]

How would you go about doing:

cosx = 1- cosx?

I was told to graph it, but now I'm just confused!

 

[pLuvia]

Solving it?
cosx=1-cosx
2cosx=1
cosx=1/2
x=pi/3, 5pi/3

 

[Riviet]

Hi Carolyn! Haven't talked to you in ages.

cosx = 1- cosx
2cosx = 1
cosx = 1/2
x = pi/3, 5pi/3, 7pi/3...

or a general solution:
x=2.pi.n + pi/3, n is an integer

If you want to do it by graphing, graph y=cosx and y=1-cosx on the same set of axes and all intersection points of the two curves will be your solutions.

Hope that helps.

 

[karoooh]

Hey Brian! Hey Andy!

ZOMG! You're both legends! Thanks heaps!