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H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
1
February 09, 2015
Feb 58:39 PM
Please grab the warm up off of the chair in the front of the room and begin working!
out on your desk to be checked. (Pre‐requisite
for graphing Sine and Cosine)
Have your homework
#2 Fix to y = ‐5cos (2πx ‐ 2) + 9
add the x!
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
2
February 09, 2015
Feb 810:11 PM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 810:04 PM
Check your homework from last night
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 26:56 AM
This quiz is coming...
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 58:42 PM
Objective: Students will be able to identify the transformations from a trigonometric function and sketch the graph.
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:39 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:40 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:41 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:41 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:41 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:41 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 68:42 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 58:44 PM
Trigonometric parent functions:
y = sin x
Period: How long the trig. function takes to complete one cycle.
How long does
sine take to complete
one cycle?
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 58:54 PM
Trigonometric parent functions:
y = cos x
what is cosine's period?
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 59:24 PM
How can you remember these graphs?
y = sin x
"up humpdown hump" "ovaries"
y = cos x
π 2π3π2
π2
‐1
1
π 2π3π2
π2
‐1
1
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 58:43 PM
Recall transformations of other parent functions:
y = a sin b(x c) + d inside oppositeoutside same
a vertical stretch/shrink amplitude
b horizontal stretch/shrink period length
c shift left and right phase shift
d shift up and down location of midline
Trig meaning:
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 412:55 PM
Steps for identifying the transformations.
1). Factor what's on the inside first so there is NO coefficient on x.
2). look at d => determines the location of the midline.
y = a sin b(x c) + d
3). look at a => determines the distance the function travels away from the mid line.
5). look at b => determines the period of the function 2π b
Period =
4). look at c => determines the shift right or left
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 59:21 PM
y = sin x Recall the graph of sine.
Period:
Amplitude:
Phase shift:
Midline:π 2π3π
2 π2
‐1
1
You now do the same for the cosine graph
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 59:19 PM
For example:y = 4 sin x + 5
What transformations do you see here?
1). Draw the mid line
2). Mark the amplitude (distance away from midline
3). Sketch graph appropriately based on trig function
(sin up hump down hump)
(cos ovaries)
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 59:18 PM
y = 6 cos x 3For example:
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 41:09 PM
Let's add a "c"
y = 2 sin (x π) + 4
1). Draw midline.
2). Mark the amplitude.
3). Shift starting point right or left c units.
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 41:12 PM
Let's add a "c" continued...
y = 5 cos (x + ) 83π4
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 41:02 PM
Practice Step 1:
y = 4 sin (3x 2π) + 8
y = 5 sin (2x ) + 4π3
y = a sin b(x c) + d
1). Factor what's on the inside first so there is NO coefficient on x.
y= 6 cos ( x ) 103π4
12
Let's put it all together:On your communicator
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
24
February 09, 2015
Feb 41:14 PM
Let's put it all together:
y = 4 sin (3πx 2π) + 8
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 98:48 AM
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 41:17 PM
y = 5 sin (2x ) + 4π3
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 41:27 PM
y= 6 cos ( x ) 103π4
12
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 36:32 AM
Exit Slip: On a piece of paper please answer the following questions.
1. What is the period of y = sin(x)?
2. What transformation moves the graph left or right?
3. What transformation moves the graph up or down?
4. What transformation makes the graph move more distance away from the midline?
5. What transformation changes how long it takes a sinusoidal function to complete one full rotation?
H. PreCalc. Unit 4 Trigonometric Functions Graphing Sine and Cosine Notes.notebook
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February 09, 2015
Feb 52:39 PM