--- a/Number.st	Sat Nov 09 19:42:33 2019 +0100
+++ b/Number.st	Sun Nov 10 03:50:58 2019 +0100
@@ -3703,6 +3703,18 @@
     ^ 1 / self tan
 !
 
+csc
+    "return the cosecant of the receiver (interpreted as radians)"
+
+    ^ 1 / self sin
+!
+
+sec
+    "return the secant of the receiver (interpreted as radians)"
+
+    ^ 1 / self cos
+!
+
 sin
     "return the sine of the receiver (interpreted as radians)"