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*1000)-arctan(0.01*1000)-arctan(1000/0.375)-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*1000)-arctan(0.01*1000)-arctan(1000/0.375)-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61)
        =-90-arctan100-arctan(0.01*1000)-arctan(1000/0.375)-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61)
        =-90-arctan100-arctan10-arctan(1000/0.375)-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61)
        =-90-arctan100-arctan10-arctan2666.666667-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61)
        =-90-arctan100-arctan10-arctan2666.666667-arctan11.785504+arctan(1000/3)+arctan(1000/10.61)
        =-90-arctan100-arctan10-arctan2666.666667-arctan11.785504+arctan333.333333+arctan(1000/10.61)
        =-90-arctan100-arctan10-arctan2666.666667-arctan11.785504+arctan333.333333+arctan94.250707
        =-90-1.560797-arctan10-arctan2666.666667-arctan11.785504+arctan333.333333+arctan94.250707
        =-90-1.560797-1.471128-arctan2666.666667-arctan11.785504+arctan333.333333+arctan94.250707
        =-90-1.560797-1.471128-1.570421-arctan11.785504+arctan333.333333+arctan94.250707
        =-90-1.560797-1.471128-1.570421-1.486149+arctan333.333333+arctan94.250707
        =-90-1.560797-1.471128-1.570421-1.486149+1.567796+arctan94.250707
        =-90-1.560797-1.471128-1.570421-1.486149+1.567796+1.560187
        =-91.560797-1.471128-1.570421-1.486149+1.567796+1.560187
        =-93.031925-1.570421-1.486149+1.567796+1.560187
        =-94.602346-1.486149+1.567796+1.560187
        =-96.088495+1.567796+1.560187
        =-94.520699+1.560187
        =-92.960512
    答案:-90-arctan(0.1*1000)-arctan(0.01*1000)-arctan(1000/0.375)-arctan(1000/84.85)+arctan(1000/3)+arctan(1000/10.61)=-92.960512
    注：弧度制

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