lib/dydx/algebra/set/sin.rb in dydx-0.1.2 vs lib/dydx/algebra/set/sin.rb in dydx-0.1.3

@@ -10,12 +10,13 @@
 
         def to_s
           "sin( #{x.to_s} )"
         end
 
-        def d(sym=:x)
+        def differentiate(sym=:x)
           cos(x) * x.d(sym)
         end
+        alias_method :d, :differentiate
       end
     end
   end
-end
\ No newline at end of file
+end