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(0.2*0.834)-arctan(0.0625*0.834)-arctan(57.143*0.834)+arctan(10*0.834) 的值.
    题型：数学计算
    解:
          90-arctan(0.2*0.834)-arctan(0.0625*0.834)-arctan(57.143*0.834)+arctan(10*0.834)
        =90-arctan0.1668-arctan(0.0625*0.834)-arctan(57.143*0.834)+arctan(10*0.834)
        =90-arctan0.1668-arctan0.052125-arctan(57.143*0.834)+arctan(10*0.834)
        =90-arctan0.1668-arctan0.052125-arctan47.657262+arctan(10*0.834)
        =90-arctan0.1668-arctan0.052125-arctan47.657262+arctan8.34
        =90-0.165278-arctan0.052125-arctan47.657262+arctan8.34
        =90-0.165278-0.052078-arctan47.657262+arctan8.34
        =90-0.165278-0.052078-1.549816+arctan8.34
        =90-0.165278-0.052078-1.549816+1.451462
        =89.834722-0.052078-1.549816+1.451462
        =89.782644-1.549816+1.451462
        =88.232828+1.451462
        =89.68429
    答案:90-arctan(0.2*0.834)-arctan(0.0625*0.834)-arctan(57.143*0.834)+arctan(10*0.834)=89.68429
    注：弧度制

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