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(15.15*0.57)-arctan(0.57)*arctan(0.25*0.57)-arctan(114.78*0.57) 的值.
    题型：数学计算
    解:
          90+arctan(15.15*0.57)-arctan(0.57)*arctan(0.25*0.57)-arctan(114.78*0.57)
        =90+arctan8.6355-arctan(0.57)*arctan(0.25*0.57)-arctan(114.78*0.57)
        =90+arctan8.6355-arctan0.57*arctan(0.25*0.57)-arctan(114.78*0.57)
        =90+arctan8.6355-arctan0.57*arctan0.1425-arctan(114.78*0.57)
        =90+arctan8.6355-arctan0.57*arctan0.1425-arctan65.4246
        =90+1.455509-arctan0.57*arctan0.1425-arctan65.4246
        =90+1.455509-0.518069*arctan0.1425-arctan65.4246
        =90+1.455509-0.518069*0.141547-arctan65.4246
        =90+1.455509-0.518069*0.141547-1.555513
        =90+1.455509-0.073331-1.555513
        =91.455509-0.073331-1.555513
        =91.382178-1.555513
        =89.826665
    答案:90+arctan(15.15*0.57)-arctan(0.57)*arctan(0.25*0.57)-arctan(114.78*0.57)=89.826665
    注：弧度制

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