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1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
2 | #include |
2 | #include |
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3 | - | ||
4 | double |
3 | |
5 | atanh(double x) |
4 | double atanh(double x) |
6 | { |
5 | { |
7 | return log((1+x)/(1-x)) / 2.0; |
6 | return log((1 + x) / (1 - x)) / 2.0; |