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(0.12×1.3)-arctan(0.02×1.3)-arctan(1/0.205×0.1|3)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3) 的值.
    题型：数学计算
    解:
          -90-arctan(0.12×1.3)-arctan(0.02×1.3)-arctan(1/0.205×0.1|3)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan(0.02×1.3)-arctan(1/0.205×0.13)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan0.026-arctan(1/0.205×0.13)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan0.026-arctan0.634146-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan0.026-arctan0.634146-arctan0.054408+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan0.026-arctan0.634146-arctan0.054408+arctan1+arctan(1/7.073×1.3)
        =-90-arctan0.156-arctan0.026-arctan0.634146-arctan0.054408+arctan1+arctan0.183798
        =-90-0.154753-arctan0.026-arctan0.634146-arctan0.054408+arctan1+arctan0.183798
        =-90-0.154753-0.025994-arctan0.634146-arctan0.054408+arctan1+arctan0.183798
        =-90-0.154753-0.025994-0.565149-arctan0.054408+arctan1+arctan0.183798
        =-90-0.154753-0.025994-0.565149-0.054354+arctan1+arctan0.183798
        =-90-0.154753-0.025994-0.565149-0.054354+0.785398+arctan0.183798
        =-90-0.154753-0.025994-0.565149-0.054354+0.785398+0.181769
        =-90.154753-0.025994-0.565149-0.054354+0.785398+0.181769
        =-90.180747-0.565149-0.054354+0.785398+0.181769
        =-90.745896-0.054354+0.785398+0.181769
        =-90.80025+0.785398+0.181769
        =-90.014852+0.181769
        =-89.833083
    答案:-90-arctan(0.12×1.3)-arctan(0.02×1.3)-arctan(1/0.205×0.1|3)-arctan(1/23.894×1.3)+arctan(1/1.3×1.3)+arctan(1/7.073×1.3)=-89.833083
    注：弧度制

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