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Find the simplest value of

cos-1x + cos-1(x/2 + √(3 - 3x2)/2), ∀ x ∈ (1/2, 1)

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Best answer

We have

cos-1x + cos-1(x/2 + √(3 - 3x2)/2), ∀ x ∈ (1/2, 1)

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