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(9.41×0.425)-arctan0.425-arctan(0.5×0.425)-arctan(110.68×0.425) 的值.
    题型：数学计算
    解:
          90+arctan(9.41×0.425)-arctan0.425-arctan(0.5×0.425)-arctan(110.68×0.425)
        =90+arctan3.99925-arctan0.425-arctan(0.5×0.425)-arctan(110.68×0.425)
        =90+arctan3.99925-arctan0.425-arctan0.2125-arctan(110.68×0.425)
        =90+arctan3.99925-arctan0.425-arctan0.2125-arctan47.039
        =90+1.325774-arctan0.425-arctan0.2125-arctan47.039
        =90+1.325774-0.401871-arctan0.2125-arctan47.039
        =90+1.325774-0.401871-0.209385-arctan47.039
        =90+1.325774-0.401871-0.209385-1.549541
        =91.325774-0.401871-0.209385-1.549541
        =90.923903-0.209385-1.549541
        =90.714518-1.549541
        =89.164977
    答案:90+arctan(9.41×0.425)-arctan0.425-arctan(0.5×0.425)-arctan(110.68×0.425)=89.164977
    注：弧度制

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