Trigonometry L1-4 Definitions of Trigonometric Functions

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# Trigonometry L1-4 Definitions of Trigonometric Functions - PowerPoint PPT Presentation

Trigonometry L1-4 Definitions of Trigonometric Functions. r. y. θ. x. Ex1. Find the six trig functions for the angle whose terminal side passes through (4,-2). 4. θ. -2. r. 4 2 + (-2) 2 = r 2. Ex2. Find the six trig functions for the angle θ

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## Trigonometry L1-4 Definitions of Trigonometric Functions

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Trigonometry L1-4 Definitions of

Trigonometric Functions

r

y

θ

x

Ex1. Find the six trig functions for the angle

whose terminal side passes through (4,-2).

4

θ

-2

r

42 + (-2)2 = r2

Ex2. Find the six trig functions for the angle θ

that terminates in QIII and sinθ = -2/3.

θ

-x

(-2)2 + x2 = 32

-2

3

Ex3. Find the six trig functions for the angle

θ = 135˚.

Reference angle is 45˚

in Q2

Ex4. Find the six trig functions for the angle

θ = 270˚.