Answer each of the following questions in one word or one sentence or as per exact requirement of the question:

Evaluate: .

Given sin^{-1} (sin 3π/5)

We know that sin^{-1} (sin θ) = π – θ, if θ ∈ [π/2, 3π/2]

= π – 3π/5

= 2π/5

∴ sin^{-1} (sin 3π/5) = 2π/5

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