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 -90-2*arctan(12.79/25)-arctan(12.79)+arctan(12.79/2) 的值.
    题型：数学计算
    解:
          -90-2*arctan(12.79/25)-arctan(12.79)+arctan(12.79/2)
        =-90-2*arctan0.5116-arctan(12.79)+arctan(12.79/2)
        =-90-2*arctan0.5116-arctan12.79+arctan(12.79/2)
        =-90-2*arctan0.5116-arctan12.79+arctan6.395
        =-90-2*0.472884-arctan12.79+arctan6.395
        =-90-2*0.472884-1.492769+arctan6.395
        =-90-2*0.472884-1.492769+1.41568
        =-90-0.945768-1.492769+1.41568
        =-90.945768-1.492769+1.41568
        =-92.438537+1.41568
        =-91.022857
    答案:-90-2*arctan(12.79/25)-arctan(12.79)+arctan(12.79/2)=-91.022857
    注：弧度制

你的问题在这里没有得到解决？请到 热门难题 里面看看吧！