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BALTIC-WAY 1995 Problem 7

  • Answer

Prove that sin⁡318∘+sin⁡218∘=1/8\sin ^{3} 18^{\circ}+\sin ^{2} 18^{\circ}=1 / 8.

Dataset text NuminaMath olympiads. Quoted with source.

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\frac{1}{8}

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