Trig Idents
       1
sinX=-----
     cscX

       1
cosX=-----
     secX

     sinX
tanX=-----
     cosX

     cosX
cotX=-----
     sinX

       1
secX=-----
     cosX

       1
cscX=-----
     sinX~
Derivatives
sinX=cosX
cosX=-sinX
tanX=(secX)^2
cotX=-(cscX)^2
secX=secXtanX
cscX=-cscXcotX~
Product Rule
dy      dy   dy
--(UV)=U--V+V--U
dx      dx   dx ~
Quotient Rule
       dx   dx
      U--V+V--U
dy U   dy   dy
-- -=----------
dx V    V^2~
Chain Rule
(fog)'(x)=f'(g(x)) g'(x)~
