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Instructional Video

Trig Identities Part 2 (Part 4 If You Watch the Proofs)

Curated and Reviewed by Lesson Planet

In this video, Sal reviews the basic trigonometric definitions and identities, including the sum of angle formulas, and then derives the double angle formulas.

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Concepts
trigonometric identities
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Additional Tags
Trigonometry, basic trigonometry identities, sum of angles formula, double angle formula, math
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Classroom Considerations
  • This video is hosted on YouTube