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〖1/1算式〗
    作业：求算式 2/3*14.3*1000*0.785*0.5*(sin(3.14159*0.281))^3/3.14159+300*25445/1000*0.45*(sin(0.281*3.14159)+sin(3.14*(1.25-2*0.281))/3.14159) 的值.
    题型：数学计算
    解:
          2/3*14.3*1000*0.785*0.5*(sin(3.14159*0.281))^3/3.14159+300*25445/1000*0.45*(sin(0.281*3.14159)+sin(3.14*(1.25-2*0.281))/3.14159)
        =2/3*14.3*1000*0.785*0.5*(sin0.882787)^3/3.14159+300*25445/1000*0.45*(sin(0.281*3.14159)+sin(3.14*(1.25-2*0.281))/3.14159)
        =2/3*14.3*1000*0.785*0.5*0.772512^3/3.14159+300*25445/1000*0.45*(sin(0.281*3.14159)+sin(3.14*(1.25-2*0.281))/3.14159)
        =2/3*14.3*1000*0.785*0.5*0.772512^3/3.14159+300*25445/1000*0.45*(sin0.882787+sin(3.14*(1.25-2*0.281))/3.14159)
        =2/3*14.3*1000*0.785*0.5*0.772512^3/3.14159+300*25445/1000*0.45*(sin0.882787+sin(3.14*0.688)/3.14159)
        =2/3*14.3*1000*0.785*0.5*0.772512^3/3.14159+300*25445/1000*0.45*(sin0.882787+sin2.16032/3.14159)
        =2/3*14.3*1000*0.785*0.5*0.772512^3/3.14159+300*25445/1000*0.45*1.037093
        =2/3*14.3*1000*0.785*0.5*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =0.666667*14.3*1000*0.785*0.5*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =9.533338*1000*0.785*0.5*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =9533.338*0.785*0.5*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =7483.67033*0.5*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =3741.835165*0.461015686683722/3.14159+300*25445/1000*0.45*1.037093
        =1725.044708/3.14159+300*25445/1000*0.45*1.037093
        =549.099248+300*25445/1000*0.45*1.037093
        =549.099248+7633500/1000*0.45*1.037093
        =549.099248+7633.5*0.45*1.037093
        =549.099248+3435.075*1.037093
        =549.099248+3562.492237
        =4111.591485
    答案:2/3*14.3*1000*0.785*0.5*(sin(3.14159*0.281))^3/3.14159+300*25445/1000*0.45*(sin(0.281*3.14159)+sin(3.14*(1.25-2*0.281))/3.14159)=4111.591485
    注：弧度制

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