Trig Proofs Involving Double-Angle Identities • [6.3c] PRE-CALCULUS 12

Learn how to use double-angle trig identities for sine and cosine in writing algebraic proofs for given trig identities.
See the rest of my videos covering other Trigonometric Identities concepts: • ★ Trig Identities [Cha...
Corresponds to chapter 6, sections 6.3 in McGraw-Hill's Pre-Calculus 12, but also fits with the trigonometry unit from almost any other Pre-Calculus course or textbook.
My instructional approach emphasizes conceptual understanding of and connections between concepts and ideas, rather than just pure memorization.
A PDF copy of the 'Video Guide' document used in these videos as well as lots of other resources are available at drive.google.c...
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Example 4 is a head spinner

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It is indeed - lots going on there! 🙂