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Trig Chapter 2

STUDY
PLAY
Cofunction
functions with a sum of 90*
Cofunction Identities
Sin A= cos (90*-A)
Sec A= csc (90*-A)
Tan A= cot (90*-A)
Cos A= sin (90*-A)
Csc A= sec (90*-A)
Cot A= tan (90*-A)
30 60 90* Triangle
30-90: root three
90- 60: 1
60- 30: 2
45 45 90* Triangle
45- 45: root two
45- 90: 1
Reference Angle
The positive acute angle made by the terminal side of the angle and the x-axis