Which of the following is true of the location of the terminal side of an angle, theta , whose sine value is 1 half ?

Since sin 30° = 1/2, the reference angle is 30°. Sine is positive in Quadrants I and II, so the terminal side can lie in either of those quadrants. Therefore, choice D, a reference angle of 30 degrees in Quadrant I or II, is correct.

AI-written and checked against the verified answer.