How do I find all values of θ in radians with -2pi<θ<2pi such that sin(θ) = -1/2?

Give the exact solutions to the given trigonometric equations. Use pi for π, i.e. 2pi/3 means 2π/3. There may be more than one answer to a given equation in the indicated range. Please list all answers in the indicated range, separating them by commas. Note that < means the endpoints of the range are excluded. Please help and explain thanks