diff options
-rw-r--r-- | ChangeLog | 5 | ||||
-rw-r--r-- | math.c | 4 |
2 files changed, 8 insertions, 1 deletions
@@ -1,3 +1,8 @@ +Sun Jan 18 18:32:20 2015 SHIBATA Hiroshi <shibata.hiroshi@gmail.com> + + * math.c (math_atan2): revive documentation before r49220. + http://d.hatena.ne.jp/nagachika/20150112/ruby_trunk_changes_49213_49226 + Sun Jan 18 15:57:32 2015 Seiei Higa <hanachin@gmail.com> * vm_method.c (check_definition): Module#public_method_defined?, @@ -37,7 +37,9 @@ VALUE rb_eMathDomainError; * call-seq: * Math.atan2(y, x) -> Float * - * Returns a angle in radians between the positive x-axis of cartesian plane + * Computes the arc tangent given +y+ and +x+. + * Returns a Float in the range -PI..PI. Return value is a angle + * in radians between the positive x-axis of cartesian plane * and the point given by the coordinates (+x+, +y+) on it. * * Domain: (-INFINITY, INFINITY) |