- #1
zeion
- 466
- 1
Homework Statement
Basically I need to solve for x that satisfies
2cosx - 2cos2x = 0
Homework Equations
The Attempt at a Solution
I changed it to 4sin(x/2)sin(3x/2) = 0
Then I know that sin(0) and sin(pi) = 0
So solve for x(1/2) = pi and x(3/2) = pi.
I get 4pi/3 and the other one is out of the indicated bound.
But this is not the only solution. How do I get all the solutions?
Thanks