【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°

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【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—

【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°

【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
=(1/2)/[√3/2-√2/2]-√(1-√3)²-1
=1/(√3-√2)-(√3-1)-1
=√3+√2-√3+1-1
=√2