Posted by don on Wednesday, November 2, 2011 at 10:02pm.
Solve 2cos sq x = 1 using the unit circle.

Trig  Reiny, Wednesday, November 2, 2011 at 10:10pm
2 cos √x = 1
cos √x = 1/2
√x = π/3 or √x = 5π/3
x = π^2/9 or x = 25π^2/9
Posted by don on Wednesday, November 2, 2011 at 10:02pm.
Solve 2cos sq x = 1 using the unit circle.
2 cos √x = 1
cos √x = 1/2
√x = π/3 or √x = 5π/3
x = π^2/9 or x = 25π^2/9