1. Ch.14.3_GraphingFunctions.notebook March 05, 2012
Chapter 14.3
Graphing the Sine Function
Reference Angle
The acute angle between the x­axis
and the "terminal" side of the angle
90 90
180 180
0 or 360 0 or 360
270 270
What is the REFERENCE angle for
a 9830 angle?
1

2. Ch.14.3_GraphingFunctions.notebook March 05, 2012
θ sin(θ)
00 1
y
300
600
θ
90 0
x
1200
1500
1800
2100
2400
2700
3000
3300
3600
1
.75
.5
.25
900 1800 2700 3600
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3. Ch.14.3_GraphingFunctions.notebook March 05, 2012
http://www.youtube.com/watch?v=Ohp6Okk_tww
http://www.math.utah.edu/~palais/cossin.html
3

4. Ch.14.3_GraphingFunctions.notebook March 05, 2012
Page 626
22 ­ 33 all
Give the ratio AND the reference angle
4