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130207 5.2 sum and difference formulas.notebook 1 February 11, 2013 Section 5.2 Sum and Difference Formulas Questions: DLIQ How could we possibly remember these new sum and difference formulas?

130207 5.2 sum and difference formulas.notebook

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Page 1: 130207 5.2 sum and difference formulas.notebook

130207 5.2 sum and difference formulas.notebook

1

February 11, 2013

Section 5.2Sum and Difference Formulas

Questions: DLIQ

How could we possibly remember these new sum and difference formulas?

Page 2: 130207 5.2 sum and difference formulas.notebook

130207 5.2 sum and difference formulas.notebook

2

February 11, 2013

What happend to sin? We applied the difference formula for cosine...

Page 3: 130207 5.2 sum and difference formulas.notebook

130207 5.2 sum and difference formulas.notebook

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February 11, 2013

The Cosine of the Difference of Two Angles

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130207 5.2 sum and difference formulas.notebook

4

February 11, 2013

Page 5: 130207 5.2 sum and difference formulas.notebook

130207 5.2 sum and difference formulas.notebook

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February 11, 2013

Example

Example

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130207 5.2 sum and difference formulas.notebook

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February 11, 2013

Sum and Difference Formulas for Cosines and Sines

Page 7: 130207 5.2 sum and difference formulas.notebook

130207 5.2 sum and difference formulas.notebook

7

February 11, 2013

Example

Example

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130207 5.2 sum and difference formulas.notebook

8

February 11, 2013

Example

Sum and Difference Formulas for Tangents

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130207 5.2 sum and difference formulas.notebook

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February 11, 2013

Homework:

page 587 #1­32 ALL

Note: Next class we will do 5.2 part II... the homework will be 33­54 ALL

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130207 5.2 sum and difference formulas.notebook

10

February 11, 2013

Example

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130207 5.2 sum and difference formulas.notebook

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February 11, 2013

(a)(b)(c)(d)

(a)

(b)

(c)

(d)

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130207 5.2 sum and difference formulas.notebook

12

February 11, 2013

(a) 

(b)

(c)

(d)