Trigonometry

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Inverse Functions

Cot= Adj/Opp

Sec= Hyp/Adj

CSC= Hyp/Opp

Fundamental Trigonometric Identites

Cofunction Identites

tan(90-u)=cot u

cot(90-u)=tan u

cos(90-u)=sin u

sec(90-u)=csc u

sin(90-u)=cosu

csc(90-u)= sec u

Quotient Identites

cot u=cos u/sin u

tan u=sin u/cos u

Reciprical Identities

tan u=1/cot u

cot u=1/tan u

cos u=1/sec u

sec u=1/cos u

Sin u=1/csc u

Csc u=1/sin u

Trig Functions

Tan= Opp/Adj

Cos= Adj/Hyp

SIn= Opp/Hyp