总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 arctan(0.133*153.46*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(153.46*0.56) 的值.
    题型：数学计算
    解:
          arctan(0.133*153.46*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(153.46*0.56)
        =arctan11.429701-90-arctan(0.56)-arctan(0.5*0.56)-arctan(153.46*0.56)
        =arctan11.429701-90-arctan0.56-arctan(0.5*0.56)-arctan(153.46*0.56)
        =arctan11.429701-90-arctan0.56-arctan0.28-arctan(153.46*0.56)
        =arctan11.429701-90-arctan0.56-arctan0.28-arctan85.9376
        =1.483527-90-arctan0.56-arctan0.28-arctan85.9376
        =1.483527-90-0.510488-arctan0.28-arctan85.9376
        =1.483527-90-0.510488-0.273009-arctan85.9376
        =1.483527-90-0.510488-0.273009-1.559161
        =-88.516473-0.510488-0.273009-1.559161
        =-89.026961-0.273009-1.559161
        =-89.29997-1.559161
        =-90.859131
    答案:arctan(0.133*153.46*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(153.46*0.56)=-90.859131
    注：弧度制

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