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4.4 Compound Angle Formulas

Textbook

Advanced Functions McGraw-Hill

Chapter

Section

4.4

Solutions 53 Videos

Lecture with examples 12 Videos

1 A First example of Compounded Angle Formula with Cosine

2 Evaluating Cos 75 in Exact Values

3 Evaluating Cos 15 in Exact Values

4 Simplifying Trig Expression using Sine Formula

5 Simplifying Trig Expression using Cosine Formula

6 Proving Cosine Cofunctional Identities with Compounded Angle Formulas

7 Proving Identities with Tangent Compounded Angle Formula

8 Identity of Differential Quotient using Sine Compounded Angle Formulas

9 Find sinA+B from given ratios ex1

10 Find sinA+B from given ratios ex2

11 Finding the location of 2x angle given single x

12 Finding double of x ratios given single x ratios

Proofs of Compounded Angle Fromulas 4 Videos

1 Introduction to Compounded Angle Fomula of Trig Ratios

2 Proof of Compounded Angle Formula using Unit Circle for Cosine Ratio

3 Proof of Sine Compounded Angle Formula using the Cosine Formula

4 Proof of Tangent Compounded Angle Formulas