trac 20099 details

Author: Frédéric Chapoton

src/sage/functions/log.py

@@ -74,7 +74,7 @@ def __init__(self):
             sage: exp(7*pi*I/2)
             -I
 
-        For the sake of simplification, the argument is reduced the
+        For the sake of simplification, the argument is reduced modulo the
         period of the complex exponential function, `2\pi i`::
 
             sage: k = var('k', domain='integer')

src/sage/functions/trig.py

@@ -44,7 +44,6 @@ def __init__(self):
             sage: sin(k*pi)
             0
 
-
         TESTS::
 
             sage: conjugate(sin(x))
@@ -160,11 +159,10 @@ def __init__(self):
             sage: cos(1 + 2*k*pi)
             cos(1)
             sage: cos(k*pi)
-            (-1)^k
+            cos(pi*k)
             sage: cos(pi/3 + 2*k*pi)
             1/2
 
-
         TESTS::
 
             sage: conjugate(cos(x))