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*12.52)-arctan(0.02*12.52)-arctan(0.0509*12.52)-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52) 的值.
    题型：数学计算
    解:
          90-arctan(0.12*12.52)-arctan(0.02*12.52)-arctan(0.0509*12.52)-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan(0.02*12.52)-arctan(0.0509*12.52)-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan0.2504-arctan(0.0509*12.52)-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan0.2504-arctan0.637268-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan0.2504-arctan0.637268-arctan58.39328+arctan(0.8*12.52)+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan0.2504-arctan0.637268-arctan58.39328+arctan10.016+arctan(0.1252*12.52)
        =90-arctan1.5024-arctan0.2504-arctan0.637268-arctan58.39328+arctan10.016+arctan1.567504
        =90-0.983531-arctan0.2504-arctan0.637268-arctan58.39328+arctan10.016+arctan1.567504
        =90-0.983531-0.245355-arctan0.637268-arctan58.39328+arctan10.016+arctan1.567504
        =90-0.983531-0.245355-0.567373-arctan58.39328+arctan10.016+arctan1.567504
        =90-0.983531-0.245355-0.567373-1.553673+arctan10.016+arctan1.567504
        =90-0.983531-0.245355-0.567373-1.553673+1.471286+arctan1.567504
        =90-0.983531-0.245355-0.567373-1.553673+1.471286+1.002934
        =89.016469-0.245355-0.567373-1.553673+1.471286+1.002934
        =88.771114-0.567373-1.553673+1.471286+1.002934
        =88.203741-1.553673+1.471286+1.002934
        =86.650068+1.471286+1.002934
        =88.121354+1.002934
        =89.124288
    答案:90-arctan(0.12*12.52)-arctan(0.02*12.52)-arctan(0.0509*12.52)-arctan(4.664*12.52)+arctan(0.8*12.52)+arctan(0.1252*12.52)=89.124288
    注：弧度制

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