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Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the value of cos–1 (cos 6).
Given cos-1 (cos 6)
We know that cos-1 (cos θ) = 2π – θ, if θ ∈ [π, 2π]
= 2π – 6
∴ cos-1 (cos 6) = 2π - 6