Index: lib/libc/gen/exec.3
===================================================================
--- lib/libc/gen/exec.3
+++ lib/libc/gen/exec.3
@@ -28,7 +28,7 @@
 .\"     @(#)exec.3	8.3 (Berkeley) 1/24/94
 .\" $FreeBSD$
 .\"
-.Dd July 28, 2018
+.Dd September 1, 2019
 .Dt EXEC 3
 .Os
 .Sh NAME
@@ -310,6 +310,11 @@
 functions
 conform to
 .St -p1003.1-88 .
+.Sh HISTORY
+The
+.Fn exec
+function appeared in
+.At v1. 
 The
 .Fn execvP
 function first appeared in
Index: lib/libc/stdio/getc.3
===================================================================
--- lib/libc/stdio/getc.3
+++ lib/libc/stdio/getc.3
@@ -32,7 +32,7 @@
 .\"     @(#)getc.3	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD$
 .\"
-.Dd January 10, 2003
+.Dd September 2, 2019
 .Dt GETC 3
 .Os
 .Sh NAME
@@ -153,6 +153,20 @@
 .Fn getchar_unlocked
 functions conform to
 .St -p1003.1-2001 .
+.Sh HISTORY
+The
+.Fn getc
+and
+.Fn getw
+functions first appeared in
+.At v1 ;
+.Fn getchar
+in
+.At v2 ;
+and
+.Fn fgetc
+in
+.At v7 .
 .Sh BUGS
 Since
 .Dv EOF
Index: lib/libc/stdlib/exit.3
===================================================================
--- lib/libc/stdlib/exit.3
+++ lib/libc/stdlib/exit.3
@@ -32,7 +32,7 @@
 .\"     @(#)exit.3	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD$
 .\"
-.Dd May 28, 2018
+.Dd September 1, 2019
 .Dt EXIT 3
 .Os
 .Sh NAME
@@ -131,3 +131,8 @@
 .Fn _Exit
 functions conform to
 .St -isoC-99 .
+.Sh HISTORY
+The
+.Fn exit
+function appeared in
+.At v1 .
Index: lib/msun/man/cos.3
===================================================================
--- lib/msun/man/cos.3
+++ lib/msun/man/cos.3
@@ -81,3 +81,8 @@
 .Sh STANDARDS
 These functions conform to
 .St -isoC-99 .
+.Sh HISTORY
+A
+.Fn cos
+function appeared in
+.At v1 .
Index: lib/msun/man/log.3
===================================================================
--- lib/msun/man/log.3
+++ lib/msun/man/log.3
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd June 3, 2013
+.Dd September 2, 2019
 .Dt LOG 3
 .Os
 .Sh NAME
@@ -135,3 +135,14 @@
 .Fn log1pl
 functions conform to
 .St -isoC-99 .
+.Sh HISTORY
+The
+.Fn log
+functions first appeared in
+.At v1 ;
+.Fn log10
+in
+.At v7 ;
+.Fn log1p
+in
+.Bx 4.3 .
Index: lib/msun/man/sin.3
===================================================================
--- lib/msun/man/sin.3
+++ lib/msun/man/sin.3
@@ -29,7 +29,7 @@
 .\"     from: @(#)sin.3	6.7 (Berkeley) 4/19/91
 .\" $FreeBSD$
 .\"
-.Dd January 24, 2008
+.Dd September 2, 2019
 .Dt SIN 3
 .Os
 .Sh NAME
@@ -80,3 +80,8 @@
 .Sh STANDARDS
 These functions conform to
 .St -isoC-99 .
+.Sh HISTORY
+A
+.Fn sin
+function appeared in
+.At v1 .