| Summary: | The main focus of this lesson is the four Sum and difference Identities for sine & cosine:
sin (A+B)
sin (A-B)
cos (A+B)
cos (A-B)
This lesson then moves on to the two Double Angle Identities for sine & cosine:
sin (2A)
cos (2A)
After this lesson, you will be able to:
- find the exact value of angles using the Sum and Difference Identities and special angles.
- write Sum and Difference Identities as single trigonometric expressions.
- simplify expressions using the Sum and Difference Identities.
- find the formulas for the Double Angle Identities.
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