diff --git a/src/setting/Any-num.pm b/src/setting/Any-num.pm
index 8571a40f18e..c50c6ec561e 100644
--- a/src/setting/Any-num.pm
+++ b/src/setting/Any-num.pm
@@ -195,7 +195,14 @@ multi sub abs($x) { (+$x).abs() }
 multi sub exp($x) { $x.Num.exp() }
 multi sub log($x) { $x.Num.log() }
 multi sub log10($x) { $x.Num.log10 }
-multi sub sin($x, $base = 'radians') { $x.sin($base) }
+
+multi sub sin($x, $base = 'radians') {
+    $x.sin($base)
+}
+
+multi sub asin($x, $base = 'radians') {
+    $x.asin($base)
+}
 
 our Num sub rand (*@args) {
     die "too many arguments passed - 0 params expected" if @args;
diff --git a/src/setting/Complex.pm b/src/setting/Complex.pm
index 95fc184a533..8dddd963103 100644
--- a/src/setting/Complex.pm
+++ b/src/setting/Complex.pm
@@ -27,7 +27,11 @@ class Complex {
     multi method sin($base = 'radians') {
         $.re.sin($base) * $.im.cosh($base) + ($.re.cos($base) * $.im.sinh($base))i;
     }
-    
+
+    multi method asin($base = 'radians') {
+        -1i * log((self)i + sqrt(1 - self * self));
+    }
+
     multi method cos($base = 'radians') {
         $.re.cos($base) * $.im.cosh($base) - ($.re.sin($base) * $.im.sinh($base))i;
     }
@@ -217,11 +221,4 @@ multi sub exp(Complex $x) {
     $x.exp()
 }
 
-multi sub sin(Complex $x) {
-    $x.sin();
-}
-multi sub sin(Complex $x, $base) {
-    $x.sin($base);
-}
-
 # vim: ft=perl6
diff --git a/src/setting/Num.pm b/src/setting/Num.pm
index ab4efabe99d..7ed68671bb4 100644
--- a/src/setting/Num.pm
+++ b/src/setting/Num.pm
@@ -270,7 +270,7 @@ class Num is also {
         }
     }
 
-    our Num multi method sin($base = 'radians') is export {
+    our Num multi method sin($base = 'radians') {
         my $x = self!to-radians($base);
         Q:PIR {
             $P0 = find_lex "$x"