Find all values of x in the interval [0, 2π] that satisfy the equation. (Enter your answers as a comma-separated list.) 8 cos(x) − 4 = 0
8 cos(x) − 4 = 0 add 4 to both sides
8cos(x) = 4 divide both sides by 8
cos(x) = 4/8
cos(x) = 1/2 and this happens at pi/3 and 5pi/3 on the requested interval
