Add run math test

src/fun/builtins.bend

@@ -389,9 +389,6 @@ String/encode_ascii (String/Nil)       = (List/Nil)
 # The Pi constant.
 Math/PI = 3.1415926535
 
-# The Euler's number.
-Math/E = 2.717281728
-
 # Math/sin(a: f24) -> f24
 # Computes the sine of the given angle in radians.
 hvm Math/sin:

tests/golden_tests/run_file/math.bend

@@ -0,0 +1,18 @@
+def main:
+  use rad = Math/radians
+  return [
+    Math/sin(rad(30.0)),
+    Math/cos(rad(30.0)),
+    Math/tan(rad(30.0)),
+
+    Math/cot(rad(30.0)),
+    Math/sec(rad(30.0)),
+    Math/csc(rad(30.0)),
+
+    rad(67.4),
+
+    Math/sqrt(9.0),
+
+    Math/ceil(9.75),
+    Math/floor(9.75),
+  ]