[genius] Fixed typo

[Marek Äernockà <mcernocky src gnome org>]

commit b8d45b84748b7031f087f0895b76d03200db7dba
Author: Marek Äernockà <marek manet cz>
Date:   Sat Jul 2 00:08:31 2011 +0200

    Fixed typo

 help/C/genius.txt |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/genius.txt b/help/C/genius.txt
index 615ed2c..942008e 100644
--- a/help/C/genius.txt
+++ b/help/C/genius.txt
@@ -5161,7 +5161,7 @@ Calculus
            Return a vector of coefficients of the the cosine Fourier series
            of f with half-period L. That is, we take f defined on [0,L] take
            the even periodic extension and compute the Fourier series, which
-           only has sine terms. The series is computed up to the Nth
+           only has cosine terms. The series is computed up to the Nth
            harmonic. The coefficients are computed by numerical integration
            using NumericalIntegral. Note that a@(1) is the constant
            coefficient! That is, a@(n) refers to the term cos(x*(n-1)*pi/L).