Method cos

recipes/Python/59884_RPN_Stack_class/recipe-59884.py:191–193

(self)

                self.pop(); self.push(newx)
               
        def cos(self):
                newx = math.cos(self.getx())
                self.pop(); self.push(newx)
       
        def tan(self):
                newx = math.tan(self.getx())