2tan 30°/1-tan²30°=√3
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Answer:
tan 30° = 1/√3
2×1/√3 / 1-(1/√3)²
2/√3/
1-1/3
2/√3/3-1/3
2/√3/2/3
2×3/3×√3 = 6/2√3 = 3/√3 = √3×√3/√3 = √3
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