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4973 | right-hear | 1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
2 | #include |
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3 | |||
4 | double sinh(double x) |
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5 | { |
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6 | if(x >= 0.0) |
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7 | { |
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8 | const double epos = exp(x); |
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9 | return (epos - 1.0/epos) / 2.0; |
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10 | } |
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11 | else |
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12 | { |
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13 | const double eneg = exp(-x); |
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14 | return (1.0/eneg - eneg) / 2.0; |
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15 | } |
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16 | } |