Trig Derivative Identities

d/dx sinx

d/dx sinx

cosx

d/dx cosx

-sinx

d/dx tanx

sec²x

d/dx cscx

-cscxcotx’

d/dx secx

secxtanx

d/dx cotx

-csc²x

Positive identities

sin, sec, tan

Negative identities

cos, csc, cot

Quotient Rule

low d’high x high d’low / low * low