Select all angle measures for which cos θ = 1/2 -120 ° -60 ° 120 ° 600 ° 660 °

Answer:The general solution to cos(theta) = 1/2 is 2k π ± π /3, translated to degrees, the solution is360k ± 60 degrees, where k is an integer.For k=0, we have solutions 0 ± 60, or  {-60, +60}For k=1, we have solutions 360 ± 60, or  {300, 420}For k=2, we have solutions 720 ± 60, or  {660, 780}This is sufficient to cover the range of the answer choices, giving the angle measures for which cos(theta)=1/2 as {-60,660}Source:Read more on Brainly.com - explanation: