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ATAN !!!ATAN NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO SEE ALSO ---- !!NAME atan - arc tangent function !!SYNOPSIS __#include __ ''x''__); __ !!DESCRIPTION The __atan()__ function calculates the arc tangent of ''x''; that is the value whose tangent is ''x''. !!RETURN VALUE The __atan()__ function returns the arc tangent in radians and the value is mathematically defined to be between -PI/2 and PI/2 (inclusive). !!CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899 !!SEE ALSO acos(3), asin(3), atan2(3), cos(3), sin(3), tan(3) ----
7 pages link to
atan(3)
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Man3a
sin(3)
tan(3)
acos(3)
asin(3)
cos(3)
atan2(3)
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