For each of the following equations, find the solutions that lie in the domain 0 ≤ x < 2π. Homework Help ✎
2 sin (x) − 1 = 0
2 cos (x) = −
2 sin(x) =
cos(x) = 1
You can either draw a unit circle to find all possible solutions, or solve the equation graphically.
In what quadrants is cos(x) negative?
Picture a unit circle. At what angle is the adjacent side the same length as the hypotenuse?