Correct Answer: Option C

Explanation

sin θ = -¹/₂
= -0.5
θ = sin^-1 (0.5)
θ = 30^o
Since θ is negative
θ = 180 + 30 = 210^o
θ = 360 - 30 = 330^o
∴θ = 210^o and 330^o

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