Pc 5.4 notes_sum-diff

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Jonathan Fjelstrom

Examples of the sum and difference formulas for trig functions.

Education Technology Business

Simplifying Radicals Mini-
lesson

What about this?

5.4 Sum and Difference
Formulas
Find the exact value:
sin 75°

Find the exact value:
sin 75°

Ex. 1) Find the exact value of the following
functions:
tan 105°
cos 11π/12

Ex. 2) Evaluate without a calculator.
cos 78°cos 18° + sin 78°sin 18°
Ex. 3) Verify

Ex. 4)

Assignment:
#24 p. 404
#4, 7, 11, 14, 25, 38, 56,
58, 61

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Pc 5.4 notes_sum-diff

1. Simplifying Radicals Mini- lesson

2.

3. What about this?

4.

5. 5.4 Sum and Difference Formulas Find the exact value: sin 75°

6. Find the exact value: sin 75°

7. Ex. 1) Find the exact value of the following functions: tan 105° cos 11π/12

8. Ex. 2) Evaluate without a calculator. cos 78°cos 18° + sin 78°sin 18° Ex. 3) Verify

10. Assignment: #24 p. 404 #4, 7, 11, 14, 25, 38, 56, 58, 61