Odds and Even functions

Evaluating trig functions

Use a calculator to evaluate trig functions

Odds and Even Functions Odd Functions

sin (-) = -sin tan (- ) = -tan csc (- ) = -csc cot(- ) = -cot

• Even Functionscos (-) = cos sec (- ) = sec

Example If sin (-) = 3/5

Find sin ()

csc ()

• If cos () = -3/4

Find cos (-)

sec (-)

• If cos () = 4/5

Find cos (-)

cos ( + )

The Six Trigonometric Functions

Hypotenuse

Adjacent

Opposite

A

B

The Six Trigonometric Functions

HypotenuseAdjacent

OppositeA

B

6 Trigonometric Functionssin = opp cos = adj tan = opp

hyp hyp adj

AKA SOHCAHTOA

csc = hyp sec = hyp cot = adj

opp adj opp

And their reciprocals!!!

Example

Find the values of the six trigonometric functions of .

13 5

Example

Find the values of the six trigonometric functions of .

4

4

Example

Find the values of the six trigonometric functions of .

cos = 5/7

Example

Find the values of the six trigonometric functions of .

cot = 5

Example

Find the values of the six trigonometric functions of .

sec = 6

Example

Find the values of the six trigonometric functions of .

csc =17/4

Homework

PAGE 103 (31, 33, 35) Page 113 (1-21 odd)