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定義域[0,1],故設x=(sinθ)²;,0°≤θ≤90°. ∴y=sinθ+√3cosθ=2sin(θ+60°). ∵0°≤θ≤90°,∴60°≤θ+60°≤150°, ∴1≤2sin(θ+60°)≤2, 值域[1,2].
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