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Annotation of coherent/a/usr/man/ALL/atan, revision 1.1.1.1

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                      3: atan()                 Mathematics Function                atan()
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                      8: Calculate inverse tangent
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                     10: #include <math.h>
                     11: ddoouubbllee aattaann(_a_r_g) ddoouubbllee _a_r_g;
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                     13: atan calculates the inverse tangent of arg, which may be any real
                     14: number.  The result will be in the range [-P/2, P/2].
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                     16: ***** Example *****
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                     18: For an example of this function, see the entry for acos.
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                     20: ***** See Also *****
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                     22: errno, mathematics library
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                     64: COHERENT Lexicon                                           Page 1
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