Mathematics
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==equ==
Unary equation
Multivariate equation
==cal==
Solution inequality
Mathematical calculation
Fractional calculation
Mathematical statistics
Resolving prime factor
Fraction and Decimal Interactions
Lenders ToolBox
==LiAl==
Determinant
Matrix multiplication
Inverse matrix
==der==
Derivative function
==img==
Function image
==que==
Q&A
current location:Mathematical operation > History of Mathematical Computation
(22×5.24+30.8×1.67+12.9×17.49+13.8×4.3)/28.7=
17.8×5.24+19.2×1.67+17.8×(8.33-1.67-5.24)+(17.8-9.8)×(17.49-8.33+1.67+5.24)+(17.9-9.8)×4.3=
157.45+142.55+20=
121.142+142.55+20=
0.7×9.8×(24.25-3.47)=
0.689×228.52=
(0.7×19.11+0.65×5.14)/24.25=
228.52×(tan(45-13.091/2)*tan(45-13.091/2))-2×14.466×tan(45-13.091/2)=
228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan(45+13.091/2)=
228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan(45+13.091/2)=
(14×19.11+16.2×5.14)/24.25=
(12.9×19.11+13.8×5.14)/24.25=
17.8×3.47+(17.8-9.8)×(19.11-3.47)+(17.9-9.8)×5.14=
63.187+148.24+20=
34.658+148.24+20=
0.7×9.8×(11.63-(-9.98))=
0.675×93.61=
(0.7×5.91+0.65×5.72)/11.63=
93.61×(tan(45+13.343/2)*tan(45+13.343/2))+2×15.082×tan(45+13.343/2)=
93.61×(tan(45-13.343/2)*tan(45-13.343/2))-2×15.082×tan(45-13.343/2)=
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