ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   m a t h w o r l d dot w o l f r a m dot c o m   s l a s h   r o t a t i o n m a t r i x dot h   t   m   l   c   f	h   t   t   p   c o l o n   s l a s h   s l a s h   m a t h w o r l d dot w o l f r a m dot c o m   s l a s h   r o t a t i o n m a t r i x dot h   t   m   l   c   f	1