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-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/89.85)+arctan(0.1/3)+arctan(0.1/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/89.85)+arctan(0.1/3)+arctan(0.1/10.61)
        =-90-arctan0.01-arctan0.001-arctan0.266667-arctan(0.1/89.85)+arctan(0.1/3)+arctan(0.1/10.61)
        =-90-arctan0.01-arctan0.001-arctan0.266667-arctan0.001113+arctan(0.1/3)+arctan(0.1/10.61)
        =-90-arctan0.01-arctan0.001-arctan0.266667-arctan0.001113+arctan0.033333+arctan(0.1/10.61)
        =-90-arctan0.01-arctan0.001-arctan0.266667-arctan0.001113+arctan0.033333+arctan0.009425
        =-90-0.01-arctan0.001-arctan0.266667-arctan0.001113+arctan0.033333+arctan0.009425
        =-90-0.01-0.001-arctan0.266667-arctan0.001113+arctan0.033333+arctan0.009425
        =-90-0.01-0.001-0.260603-arctan0.001113+arctan0.033333+arctan0.009425
        =-90-0.01-0.001-0.260603-0.001113+arctan0.033333+arctan0.009425
        =-90-0.01-0.001-0.260603-0.001113+0.033321+arctan0.009425
        =-90-0.01-0.001-0.260603-0.001113+0.033321+0.009425
        =-90.01-0.001-0.260603-0.001113+0.033321+0.009425
        =-90.011-0.260603-0.001113+0.033321+0.009425
        =-90.271603-0.001113+0.033321+0.009425
        =-90.272716+0.033321+0.009425
        =-90.239395+0.009425
        =-90.22997
    答案:-90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/89.85)+arctan(0.1/3)+arctan(0.1/10.61)=-90.22997
    注：弧度制

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