Derivative of Trig Functions

d/dx cosx

-sinx

d/dx sinx

cosx

d/dx tanx

sec²x

d/dx secx

secxtanx

d/dx cotx

-csc²x

d/dx cscx

-cscxcotx

d/dx arctan

1/ (1 + x²)

d/dx arcsin

1/ (root( 1 - x²))

d/dx arccos

-1/ (root( 1 - x²))

d/dx logbx

1/ (x * lnb)