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(0.1*8.19)-arctan(0.2*8.19)-arctan(0.0583*8.19)-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19) 的值.
    题型：数学计算
    解:
          90-arctan(0.1*8.19)-arctan(0.2*8.19)-arctan(0.0583*8.19)-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19)
        =90-arctan0.819-arctan(0.2*8.19)-arctan(0.0583*8.19)-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19)
        =90-arctan0.819-arctan1.638-arctan(0.0583*8.19)-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19)
        =90-arctan0.819-arctan1.638-arctan0.477477-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19)
        =90-arctan0.819-arctan1.638-arctan0.477477-arctan51.1875+arctan(1.25*8.19)+arctan(0.2681*8.19)
        =90-arctan0.819-arctan1.638-arctan0.477477-arctan51.1875+arctan10.2375+arctan(0.2681*8.19)
        =90-arctan0.819-arctan1.638-arctan0.477477-arctan51.1875+arctan10.2375+arctan2.195739
        =90-0.686219-arctan1.638-arctan0.477477-arctan51.1875+arctan10.2375+arctan2.195739
        =90-0.686219-1.022692-arctan0.477477-arctan51.1875+arctan10.2375+arctan2.195739
        =90-0.686219-1.022692-0.445467-arctan51.1875+arctan10.2375+arctan2.195739
        =90-0.686219-1.022692-0.445467-1.551263+arctan10.2375+arctan2.195739
        =90-0.686219-1.022692-0.445467-1.551263+1.473425+arctan2.195739
        =90-0.686219-1.022692-0.445467-1.551263+1.473425+1.143438
        =89.313781-1.022692-0.445467-1.551263+1.473425+1.143438
        =88.291089-0.445467-1.551263+1.473425+1.143438
        =87.845622-1.551263+1.473425+1.143438
        =86.294359+1.473425+1.143438
        =87.767784+1.143438
        =88.911222
    答案:90-arctan(0.1*8.19)-arctan(0.2*8.19)-arctan(0.0583*8.19)-arctan(6.25*8.19)+arctan(1.25*8.19)+arctan(0.2681*8.19)=88.911222
    注：弧度制

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