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*55.97*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(55.97*0.56) 的值.
    题型：数学计算
    解:
          arctan(0.133*55.97*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(55.97*0.56)
        =arctan4.168646-90-arctan(0.56)-arctan(0.5*0.56)-arctan(55.97*0.56)
        =arctan4.168646-90-arctan0.56-arctan(0.5*0.56)-arctan(55.97*0.56)
        =arctan4.168646-90-arctan0.56-arctan0.28-arctan(55.97*0.56)
        =arctan4.168646-90-arctan0.56-arctan0.28-arctan31.3432
        =1.335359-90-arctan0.56-arctan0.28-arctan31.3432
        =1.335359-90-0.510488-arctan0.28-arctan31.3432
        =1.335359-90-0.510488-0.273009-arctan31.3432
        =1.335359-90-0.510488-0.273009-1.538902
        =-88.664641-0.510488-0.273009-1.538902
        =-89.175129-0.273009-1.538902
        =-89.448138-1.538902
        =-90.98704
    答案:arctan(0.133*55.97*0.56)-90-arctan(0.56)-arctan(0.5*0.56)-arctan(55.97*0.56)=-90.98704
    注：弧度制

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