cos-1 1/2 + 2 sin-1 1/2 = (a) 2π/3(b) π/2(c) 4π/3(d) none of thes – InterviewSolution

1.	cos-1 1/2 + 2 sin-1 1/2 = (a) 2π/3(b) π/2(c) 4π/3(d) none of these
Answer» Answer is (a) 2π/3

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