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Squared sine equal to one quarter, with the angle confined to [0, π], is satisfied by
Aπ/6 only
Bπ/6 and 5π/6
Cπ/6 and π/3
Dπ/3 and 2π/3
Answer & Solution
Correct answer: B. π/6 and 5π/6
sin x = 1/2 holds in [0, π] at x = π/6 and x = 5π/6, while sin x = -1/2 never occurs there.
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