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 -90-arctan(0.12×34.6)-arctan(0.02×34.6)-arctan(34.6/0.205)-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073) 的值.
    题型：数学计算
    解:
          -90-arctan(0.12×34.6)-arctan(0.02×34.6)-arctan(34.6/0.205)-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073)
        =-90-arctan4.152-arctan(0.02×34.6)-arctan(34.6/0.205)-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073)
        =-90-arctan4.152-arctan0.692-arctan(34.6/0.205)-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073)
        =-90-arctan4.152-arctan0.692-arctan168.780488-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073)
        =-90-arctan4.152-arctan0.692-arctan168.780488-arctan1.448062+arctan(34.6/1.3)+arctan(34.6/7.073)
        =-90-arctan4.152-arctan0.692-arctan168.780488-arctan1.448062+arctan26.615385+arctan(34.6/7.073)
        =-90-arctan4.152-arctan0.692-arctan168.780488-arctan1.448062+arctan26.615385+arctan4.891842
        =-90-1.33445-arctan0.692-arctan168.780488-arctan1.448062+arctan26.615385+arctan4.891842
        =-90-1.33445-0.605337-arctan168.780488-arctan1.448062+arctan26.615385+arctan4.891842
        =-90-1.33445-0.605337-1.564872-arctan1.448062+arctan26.615385+arctan4.891842
        =-90-1.33445-0.605337-1.564872-0.966422+arctan26.615385+arctan4.891842
        =-90-1.33445-0.605337-1.564872-0.966422+1.533242+arctan4.891842
        =-90-1.33445-0.605337-1.564872-0.966422+1.533242+1.369153
        =-91.33445-0.605337-1.564872-0.966422+1.533242+1.369153
        =-91.939787-1.564872-0.966422+1.533242+1.369153
        =-93.504659-0.966422+1.533242+1.369153
        =-94.471081+1.533242+1.369153
        =-92.937839+1.369153
        =-91.568686
    答案:-90-arctan(0.12×34.6)-arctan(0.02×34.6)-arctan(34.6/0.205)-arctan(34.6/23.894)+arctan(34.6/1.3)+arctan(34.6/7.073)=-91.568686
    注：弧度制

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