Final answer:
The exact value of sin 150° is -0.5.
Step-by-step explanation:
The exact value of sin 150° is -0.5.
To find this, we can use the unit circle. Start by drawing a circle with a radius of 1 unit. Since 150° is in the second quadrant, the y-coordinate of the point on the unit circle corresponding to that angle will be negative.
The y-coordinate of this point is -0.5, so the exact value of sin 150° is -0.5.