Find all solutions to the equation in the interval [0, 2π).

cos 2x - cos x = 0

Question

Find all solutions to the equation in the interval [0, 2π).

cos 2x - cos x = 0

anonymous · Answer

Where might cos(2x) = cos(x)?

anonymous · Answer

quad 4?

anonymous · Answer

Do you know what a cos graph looks like from 0 to 2pi?

anonymous · Answer

no ;/

anonymous · Answer

these are my choices btw
0, two pi divided by three., four pi divided by three	

 pi divided by six., five pi divided by six, three pi divided by two. 

 0, pi divided by two., seven pi divided by six, eleven pi divided by six	

 No solution

anonymous · Answer

Forget about the choices. Understanding what a cos graph looks like will help you out a lot. |dw:1379436703218:dw|

baring my inability to draw lines, that is a cos graph.