Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
What is the principal value of 
?
Given sin-1 (-√3/2)
We know that sin-1 (-θ) = -sin-1 (θ)
= - sin-1 (√3/2)
= -π/3
∴ sin-1 (-√3/2) = -π/3
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