

atan()                 Mathematics Function                atan()




Calculate inverse tangent

#include <math.h>
ddoouubbllee aattaann(_a_r_g) ddoouubbllee _a_r_g;

atan calculates the inverse tangent of arg, which may be any real
number.  The result will be in the range [-P/2, P/2].

***** Example *****

For an example of this function, see the entry for acos.

***** See Also *****

errno, mathematics library









































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