Final answer:
The exact value of sin(30°) is 1/2, found by considering the 30-60-90 special triangle where the side opposite the 30-degree angle is half the hypotenuse.
Step-by-step explanation:
The exact value of sin(30°) can be found using the unit circle or by remembering the special triangles, particularly the 30-60-90 triangle. In this triangle, the side opposite the 30-degree angle is half the length of the hypotenuse. Since the sine of an angle in a right triangle is the ratio of the length of the side opposite the angle to the length of the hypotenuse, the sin(30°) is 1/2. Therefore, the correct answer is a) 1/2.