Note: We will be using the Demana book for most, but not all, of the assignments.

2/24 Trig Identity basics

HW D p.410-411/3-60 by 3's, 69-73 odd

2/25 Simplifying for a solution

HW D p.411-412/52-62, 75-82, 85

2/26 Proving Trig Identities

HW D p.418/11-51 odd (45, 47 are tough, don't stress), 71, 80

2/28 Sum and Difference Formulas

HW D p.425-427/3,5,7,13,17,21,27,29,31-35,37,43,45,47,48,52,55,73

3/03 Double Angle, Half Angle and Power Reducing Formulas

CW B p.374/39-41, p.385/45, 47

HW D p.432/3-30 by 3's, 39-45 odd, 53

3/04 Review and Extension Problems CW Worksheet (answer key)

HW B p.384-385/37, 51, 53 and p.390-391/23, 26-28

3/10 Trig Identities Test

There are several resources to view proofs of the angle addition and angle subtraction identities. Look them over and make sure you understand them. You will be required to prove some of the basic identities on your test and the proofs of these identities require diagrams which may not occur to you during a test situation if you haven’t thought about them before.

Demana

*Precalculus*5.3 page 421 (a distance formula based proof)
Brown

*Advanced Math*10.1 p.369 (a law of cosines based proof)
Mr. Richardson’s PowerPoint presentation

Another website with very elegant triangle proofs:

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