- #1
Speedking96
- 104
- 0
Homework Statement
4sin2(2x) -1 = 0 Solve over 0 --> 2pi
The attempt at a solution
(2sin(2x) + 1) (2sin(2x) - 1) = 0
2sin(2x) +1 = 0
sin(2x) = -1/2
2x = -pi/6
x = -pi/12 and -11pi/12 which = 23pi/12 and 13pi/12.
2sin(2x) - 1 = 0
sin(2x) = 1/2
2x = pi/6
x= pi/12 and 11pi/12
I have found these four solutions, however, I do not know how to get the other four solutions.