【2sin50+sin10(1+√3tan10)】*√(2(sin80)^2)=【2sin50+sin10(1+√3Sin10/Cos10)】*√(2(sin80)^2)=【2sin50+sin10(Cos10+√3Sin10)/Cos10)】*√(2(sin80)^2)=【2sin50+2sin10(sin30Cos10+cos30Sin10)/Cos10)】*√(2(sin80)^2)=【2sin50+2sin10sin40/Cos10)】*√(2(sin80)^2)=2【(sin50Cos10+sin10sin40)/Cos10】*√(2(sin80)^2)=2【sin60/Cos10】*√(2(sin80)^2)=2sin60/Cos10*√2*cos10 =2sin60*√2 =根号6
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