diff --git a/src/lib/luamath.pir b/src/lib/luamath.pir
index 71f7019..3ff62ae 100644
--- a/src/lib/luamath.pir
+++ b/src/lib/luamath.pir
@@ -69,6 +69,7 @@ atan
 atan2
 ceil
 cos
+cosh
 deg
 exp
 floor
@@ -85,8 +86,10 @@ rad
 random
 randomseed
 sin
+sinh
 sqrt
 tan
+tanh
 LIST
     lua_register($P1, _math, $P2)
 
@@ -204,6 +207,16 @@ LIST
 .end
 
 
+.sub 'cosh'
+    .param pmc x :optional
+    .param pmc extra :slurpy
+    .local pmc res
+    lua_checknumber(1, x)
+    res = x.'cosh'()
+    .return (res)
+.end
+
+
 .sub 'deg'
     .param pmc x :optional
     .param pmc extra :slurpy
@@ -455,6 +468,16 @@ LIST
 .end
 
 
+.sub 'sinh'
+    .param pmc x :optional
+    .param pmc extra :slurpy
+    .local pmc res
+    lua_checknumber(1, x)
+    res = x.'sinh'()
+    .return (res)
+.end
+
+
 .sub 'sqrt'
     .param pmc x :optional
     .param pmc extra :slurpy
@@ -479,6 +502,16 @@ LIST
 .end
 
 
+.sub 'tanh'
+    .param pmc x :optional
+    .param pmc extra :slurpy
+    .local pmc res
+    lua_checknumber(1, x)
+    res = x.'tanh'()
+    .return (res)
+.end
+
+
 # Local Variables:
 #   mode: pir
 #   fill-column: 100
diff --git a/src/pmc/luanumber.pmc b/src/pmc/luanumber.pmc
index 9cc9433..01b9bb6 100644
--- a/src/pmc/luanumber.pmc
+++ b/src/pmc/luanumber.pmc
@@ -987,6 +987,20 @@ Used to unarchive the number.
 
 /*
 
+=item C<PMC* cosh()>
+
+=cut
+
+*/
+    METHOD PMC* cosh() {
+        const FLOATVAL n = cosh(VTABLE_get_number(INTERP, SELF));
+        PMC * const retval = pmc_new(INTERP, dynpmc_LuaNumber);
+        VTABLE_set_number_native(INTERP, retval, n);
+        RETURN(PMC *retval);
+    }
+
+/*
+
 =item C<PMC* erf()>
 
 =cut
@@ -1461,6 +1475,34 @@ Used to unarchive the number.
 
 /*
 
+=item C<PMC* sinh()>
+
+=cut
+
+*/
+    METHOD PMC* sinh() {
+        const FLOATVAL n = sinh(VTABLE_get_number(INTERP, SELF));
+        PMC * const retval = pmc_new(INTERP, dynpmc_LuaNumber);
+        VTABLE_set_number_native(INTERP, retval, n);
+        RETURN(PMC *retval);
+    }
+
+/*
+
+=item C<PMC* tanh()>
+
+=cut
+
+*/
+    METHOD PMC* tanh() {
+        const FLOATVAL n = tanh(VTABLE_get_number(INTERP, SELF));
+        PMC * const retval = pmc_new(INTERP, dynpmc_LuaNumber);
+        VTABLE_set_number_native(INTERP, retval, n);
+        RETURN(PMC *retval);
+    }
+
+/*
+
 =item C<PMC* tgamma()>
 
 =cut