Find the principal value of cos-1 (1/2) – InterviewSolution

1.

Find the principal value of cos-1 (1/2)

Answer»

Let cos^-1 (1/2) = π

⇒ cos π = (1/2) = cos π/3

⇒ π = π/3

⇒ cos^-1 (1/2) = π/3

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