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author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
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1 \section{Built-in Module \sectcode{math}}
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2
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3 \bimodindex{math}
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4 \renewcommand{\indexsubitem}{(in module math)}
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5 This module is always available.
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6 It provides access to the mathematical functions defined by the C
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7 standard.
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8 They are:
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9 \iftexi
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10 \begin{funcdesc}{acos}{x}
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11 \funcline{asin}{x}
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12 \funcline{atan}{x}
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13 \funcline{atan2}{x, y}
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14 \funcline{ceil}{x}
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15 \funcline{cos}{x}
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16 \funcline{cosh}{x}
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17 \funcline{exp}{x}
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18 \funcline{fabs}{x}
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19 \funcline{floor}{x}
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20 \funcline{fmod}{x, y}
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21 \funcline{frexp}{x}
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22 \funcline{hypot}{x, y}
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23 \funcline{ldexp}{x, y}
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24 \funcline{log}{x}
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25 \funcline{log10}{x}
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26 \funcline{modf}{x}
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27 \funcline{pow}{x, y}
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28 \funcline{sin}{x}
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29 \funcline{sinh}{x}
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30 \funcline{sqrt}{x}
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31 \funcline{tan}{x}
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32 \funcline{tanh}{x}
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33 \end{funcdesc}
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34 \else
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35 \code{acos(\varvars{x})},
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36 \code{asin(\varvars{x})},
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37 \code{atan(\varvars{x})},
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38 \code{atan2(\varvars{x\, y})},
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39 \code{ceil(\varvars{x})},
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40 \code{cos(\varvars{x})},
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41 \code{cosh(\varvars{x})},
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42 \code{exp(\varvars{x})},
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43 \code{fabs(\varvars{x})},
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44 \code{floor(\varvars{x})},
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45 \code{fmod(\varvars{x\, y})},
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46 \code{frexp(\varvars{x})},
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47 \code{hypot(\varvars{x\, y})},
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48 \code{ldexp(\varvars{x\, y})},
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49 \code{log(\varvars{x})},
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50 \code{log10(\varvars{x})},
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51 \code{modf(\varvars{x})},
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52 \code{pow(\varvars{x\, y})},
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53 \code{sin(\varvars{x})},
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54 \code{sinh(\varvars{x})},
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55 \code{sqrt(\varvars{x})},
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56 \code{tan(\varvars{x})},
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57 \code{tanh(\varvars{x})}.
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58 \fi
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59
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60 Note that \code{frexp} and \code{modf} have a different call/return
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61 pattern than their C equivalents: they take a single argument and
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62 return a pair of values, rather than returning their second return
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63 value through an `output parameter' (there is no such thing in Python).
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64
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65 The module also defines two mathematical constants:
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66 \iftexi
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67 \begin{datadesc}{pi}
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68 \dataline{e}
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69 \end{datadesc}
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70 \else
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71 \code{pi} and \code{e}.
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72 \fi