1 files changed, 2 insertions, 2 deletions
diff --git a/math.c b/math.c
index 9aff66333a..20b3e77cee 100644
--- a/math.c
+++ b/math.c
@@ -37,8 +37,8 @@ VALUE rb_eMathDomainError;
  *  call-seq:
  *     Math.atan2(y, x)  -> Float
  *
- *  Computes the arc tangent given +y+ and +x+.
- *  Returns a Float in the range -PI..PI.
+ *  Returns 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)
  *