diff --git a/docs/cos.3fortran.html b/docs/cos.3fortran.html
index 0ba02934..1a6ebf17 100755
--- a/docs/cos.3fortran.html
+++ b/docs/cos.3fortran.html
@@ -138,7 +138,7 @@ <H3>RESULT</H3>
 </A>
 <BLOCKQUOTE>
 <P>
-The return value is the tangent of X.
+The return value is the cosine of X.
 <P>
 If X is of the type real, the return value is in radians and lies in the
 range <B>-1</B> &lt;= COS(X) &lt;= 1 .
diff --git a/docs/intrinsics_slidy.html b/docs/intrinsics_slidy.html
index 131bac0d..3faadff1 100755
--- a/docs/intrinsics_slidy.html
+++ b/docs/intrinsics_slidy.html
@@ -5093,7 +5093,7 @@ <h3 id="options-67"><strong>Options</strong></h3>
 </dl></li>
 </ul>
 <h3 id="result-50"><strong>Result</strong></h3>
-<p>The return value is the tangent of <strong>x</strong>.</p>
+<p>The return value is the cosine of <strong>x</strong>.</p>
 <p>If <strong>x</strong> is of the type real, the return value is in radians and lies in the range <strong>-1 &lt;= cos(x) &lt;= 1</strong> .</p>
 <p>If <strong>x</strong> is of type complex, its real part is regarded as a value in radians, often called the phase.</p>
 <h3 id="examples-67"><strong>Examples</strong></h3>
diff --git a/docs/intrinsics_slidy_by_section.html b/docs/intrinsics_slidy_by_section.html
index 4cba1f37..bcdd1dc0 100755
--- a/docs/intrinsics_slidy_by_section.html
+++ b/docs/intrinsics_slidy_by_section.html
@@ -5569,7 +5569,7 @@ <h1><strong>Options</strong></h1>
 </ul>
 </div><div id="result-50" class="slide section level3">
 <h1><strong>Result</strong></h1>
-<p>The return value is the tangent of <strong>x</strong>.</p>
+<p>The return value is the cosine of <strong>x</strong>.</p>
 <p>If <strong>x</strong> is of the type real, the return value is in radians and lies in the range <strong>-1 &lt;= cos(x) &lt;= 1</strong> .</p>
 <p>If <strong>x</strong> is of type complex, its real part is regarded as a value in radians, often called the phase.</p>
 </div><div id="examples-67" class="slide section level3">
diff --git a/md3/COS.md b/md3/COS.md
index 37b6da81..95531652 100644
--- a/md3/COS.md
+++ b/md3/COS.md
@@ -35,7 +35,7 @@
 
 ### **Result**
 
-  The return value is the tangent of **x**.
+  The return value is the cosine of **x**.
 
   If **x** is of the type _real_, the return value is in radians and lies in
   the range **-1 \<= cos(x) \<= 1** .
diff --git a/src/M_intrinsics.f90 b/src/M_intrinsics.f90
index 900d06ce..cc8a1bb2 100755
--- a/src/M_intrinsics.f90
+++ b/src/M_intrinsics.f90
@@ -7916,7 +7916,7 @@ function help_intrinsics_one(name,prefix,topic,m_help) result (textblock)
 '  o  X : The angle in radians to compute the cosine of.', &
 '', &
 'RESULT', &
-'  The return value is the tangent of X.', &
+'  The return value is the cosine of X.', &
 '', &
 '  If X is of the type real, the return value is in radians and lies in the', &
 '  range -1 <= COS(X) <= 1 .', &
diff --git a/standalone/fman.F90 b/standalone/fman.F90
index c977007e..0bbd49b2 100644
--- a/standalone/fman.F90
+++ b/standalone/fman.F90
@@ -7918,7 +7918,7 @@ function help_intrinsics_one(name,prefix,topic,m_help) result (textblock)
 '  o  X : The angle in radians to compute the cosine of.', &
 '', &
 'RESULT', &
-'  The return value is the tangent of X.', &
+'  The return value is the cosine of X.', &
 '', &
 '  If X is of the type real, the return value is in radians and lies in the', &
 '  range -1 <= COS(X) <= 1 .', &