Data update

Task/Trigonometric-functions/DuckDB/trigonometric-functions.duckdb

@@ -0,0 +1,22 @@
+# degrees to radians
+create or replace function radians(degrees) as degrees * pi() / 180.0;
+
+# radians to degrees
+create or replace function degrees(radians) as  (radians * 180 / pi());
+
+.mode lines
+select
+    sin(-pi() / 6),
+    cos(3 * pi() / 4),
+    tan(pi() / 3),
+    asin(-1 / 2),
+    acos(-sqrt(2)/2),
+    atan(sqrt(3)),
+
+    -- Using degrees:
+    sin(-radians(30)),
+    cos(radians(135)),
+    tan(radians(60)),
+    asin(-1 / 2).degrees(),
+    acos(-sqrt(2)/2).degrees(),
+    atan(sqrt(3)).degrees() ;

Task/Trigonometric-functions/REXX/trigonometric-functions.rexx

@@ -1,6 +1,7 @@
+-- 28 Jul 2025
 include Settings
 
-say 'TRIGONOMETRIC FUNCTIONS - 2 Mar 2025'
+say 'TRIGONOMETRIC FUNCTIONS'
 say version
 say
 s = Copies('-',77); w = 18
@@ -39,6 +40,4 @@ end
 say s
 return
 
-include Functions
-include Constants
-include Abend
+include Math