Pre-Calc/Trigonometry, 5

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Presentation transcript:

Pre-Calc/Trigonometry, 5 Pre-Calc/Trigonometry, 5.2 Sum/Difference and Double Angle Formulas for Sine and Cosine Objective: Student will be able to evaluate the sin(105) without a calculator. Standards: F-TF 8 HW: #1 study# p.260 5, 7, 13, 15, 21, 25, 27, 31, 35, 43 Assessment: Observe understanding during guided practice/Collect HW

5.2 Sum and Difference Formulas For Sine and Cosine

Let’s look for shortcuts Does sin(A+B) = sinA + sinB?

Investigation of the Sum and Difference Formulas

Double Angle Formula for Cosine

We now have 8 formulas, lets review…

5.2 Practice Problems HW: Finish and study for your quiz on identities.

HW – After Quiz p.260 5, 7, 13, 15, 21, 25, 27, 31, 35, 43