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(0.12×100)-arctan(0.02×100)-arctan(1/0.205×100)-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100) 的值.
    题型：数学计算
    解:
          -90-arctan(0.12×100)-arctan(0.02×100)-arctan(1/0.205×100)-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100)
        =-90-arctan12-arctan(0.02×100)-arctan(1/0.205×100)-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100)
        =-90-arctan12-arctan2-arctan(1/0.205×100)-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100)
        =-90-arctan12-arctan2-arctan487.8049-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100)
        =-90-arctan12-arctan2-arctan487.8049-arctan4.1852+arctan(1/1.3×100)+arctan(1/7.073×100)
        =-90-arctan12-arctan2-arctan487.8049-arctan4.1852+arctan76.9231+arctan(1/7.073×100)
        =-90-arctan12-arctan2-arctan487.8049-arctan4.1852+arctan76.9231+arctan14.1383
        =-90-1.487655-arctan2-arctan487.8049-arctan4.1852+arctan76.9231+arctan14.1383
        =-90-1.487655-1.107149-arctan487.8049-arctan4.1852+arctan76.9231+arctan14.1383
        =-90-1.487655-1.107149-1.568746-arctan4.1852+arctan76.9231+arctan14.1383
        =-90-1.487655-1.107149-1.568746-1.336256+arctan76.9231+arctan14.1383
        =-90-1.487655-1.107149-1.568746-1.336256+1.557797+arctan14.1383
        =-90-1.487655-1.107149-1.568746-1.336256+1.557797+1.500184
        =-91.487655-1.107149-1.568746-1.336256+1.557797+1.500184
        =-92.594804-1.568746-1.336256+1.557797+1.500184
        =-94.16355-1.336256+1.557797+1.500184
        =-95.499806+1.557797+1.500184
        =-93.942009+1.500184
        =-92.441825
    答案:-90-arctan(0.12×100)-arctan(0.02×100)-arctan(1/0.205×100)-arctan(1/23.894×100)+arctan(1/1.3×100)+arctan(1/7.073×100)=-92.441825
    注：弧度制

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