From a836ff8926768d7ab4393fc4b99344515d681814 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sun, 29 Jun 2014 17:50:11 -0400
Subject: Add pi/2 variable.

* sly/math.scm (pi/2): New variable.
---
 sly/math.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sly/math.scm b/sly/math.scm
index 8f7ce71..073a399 100644
--- a/sly/math.scm
+++ b/sly/math.scm
@@ -22,7 +22,7 @@
 ;;; Code:
 
 (define-module (sly math)
-  #:export (pi
+  #:export (pi pi/2
             degrees->radians
             radians->degrees
             sin-degrees
@@ -57,6 +57,7 @@
 ;;      817488               152092096
 ;;
 (define pi 3.141592654)
+(define pi/2 (/ pi 2))
 
 (define (degrees->radians angle)
   "Convert ANGLE in degrees to radians."
-- 
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