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*0.6)-arctan(0.01*0.6)-arctan(0.6/0.375)-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*0.6)-arctan(0.01*0.6)-arctan(0.6/0.375)-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61)
        =-90-arctan0.06-arctan(0.01*0.6)-arctan(0.6/0.375)-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61)
        =-90-arctan0.06-arctan0.006-arctan(0.6/0.375)-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61)
        =-90-arctan0.06-arctan0.006-arctan1.6-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61)
        =-90-arctan0.06-arctan0.006-arctan1.6-arctan0.007071+arctan(0.6/3)+arctan(0.6/10.61)
        =-90-arctan0.06-arctan0.006-arctan1.6-arctan0.007071+arctan0.2+arctan(0.6/10.61)
        =-90-arctan0.06-arctan0.006-arctan1.6-arctan0.007071+arctan0.2+arctan0.05655
        =-90-0.059928-arctan0.006-arctan1.6-arctan0.007071+arctan0.2+arctan0.05655
        =-90-0.059928-0.006-arctan1.6-arctan0.007071+arctan0.2+arctan0.05655
        =-90-0.059928-0.006-1.012197-arctan0.007071+arctan0.2+arctan0.05655
        =-90-0.059928-0.006-1.012197-0.007071+arctan0.2+arctan0.05655
        =-90-0.059928-0.006-1.012197-0.007071+0.197396+arctan0.05655
        =-90-0.059928-0.006-1.012197-0.007071+0.197396+0.05649
        =-90.059928-0.006-1.012197-0.007071+0.197396+0.05649
        =-90.065928-1.012197-0.007071+0.197396+0.05649
        =-91.078125-0.007071+0.197396+0.05649
        =-91.085196+0.197396+0.05649
        =-90.8878+0.05649
        =-90.83131
    答案:-90-arctan(0.1*0.6)-arctan(0.01*0.6)-arctan(0.6/0.375)-arctan(0.6/84.85)+arctan(0.6/3)+arctan(0.6/10.61)=-90.83131
    注：弧度制

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