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(0.12×23.894)-arctan(0.02×23.894)-arctan(1/0.205×23.894)-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894) 的值.
    题型：数学计算
    解:
          -90-arctan(0.12×23.894)-arctan(0.02×23.894)-arctan(1/0.205×23.894)-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan(0.02×23.894)-arctan(1/0.205×23.894)-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan0.47788-arctan(1/0.205×23.894)-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan0.47788-arctan116.556103-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan0.47788-arctan116.556103-arctan1.000012+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan0.47788-arctan116.556103-arctan1.000012+arctan18.380006+arctan(1/7.073×23.894)
        =-90-arctan2.86728-arctan0.47788-arctan116.556103-arctan1.000012+arctan18.380006+arctan3.378205
        =-90-1.235224-arctan0.47788-arctan116.556103-arctan1.000012+arctan18.380006+arctan3.378205
        =-90-1.235224-0.445796-arctan116.556103-arctan1.000012+arctan18.380006+arctan3.378205
        =-90-1.235224-0.445796-1.562217-arctan1.000012+arctan18.380006+arctan3.378205
        =-90-1.235224-0.445796-1.562217-0.785404+arctan18.380006+arctan3.378205
        =-90-1.235224-0.445796-1.562217-0.785404+1.516443+arctan3.378205
        =-90-1.235224-0.445796-1.562217-0.785404+1.516443+1.282999
        =-91.235224-0.445796-1.562217-0.785404+1.516443+1.282999
        =-91.68102-1.562217-0.785404+1.516443+1.282999
        =-93.243237-0.785404+1.516443+1.282999
        =-94.028641+1.516443+1.282999
        =-92.512198+1.282999
        =-91.229199
    答案:-90-arctan(0.12×23.894)-arctan(0.02×23.894)-arctan(1/0.205×23.894)-arctan(1/23.894×23.894)+arctan(1/1.3×23.894)+arctan(1/7.073×23.894)=-91.229199
    注：弧度制

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