Find the values of θ knowing that the cos (θ) = sqrt 3/ 2

Question

Find the values of θ knowing that the cos (θ) = sqrt 3/ 2

Answer 1

The cosine is positive in the first and fourth quadrants and theta = 30 degrees in the first quadrant. To find angle which has reference angle of 30 in fourth quadrant compute 360 - 30 = 330 degrees.