f r o m   m a t h   i m p o r t   s i n 
 
 
 e   =   e . r e p l a c e ( " S i n " , " s i n " ) 
 
 s e l f . s i n _ b t t n   =   B u t t o n ( s e l f ,   t e x t = " s i n " ,   w i d t h = 9 ,   h e i g h t = 3 ,   c o m m a n d = l a m b d a :   s e l f . a d d _ c h r ( ' s i n ' ) ) 
                 s e l f . s i n _ b t t n . g r i d ( r o w = 1 ,   c o l u m n = 6 ) 
 
 