Sum and Difference Identities & Formulas - Sine, Cosine, Tangent - Degrees & Radians, Trigonometry

This trigonometry video tutorial explains how to use the sum and difference identities / formulas to evaluate sine, cosine, and tangent functions that have angles that are not commonly found in the unit circle. Examples include angles both in degrees and radians.

Trigonometry - Free Formula Sheet:
https://bit.ly/47diggI

Trigonometry Video Lessons:
https://www.video-tutor.net/trigonometric-identities.html

Trigonometry Final Exam Review:
https://www.youtube.com/watch?v=OAsbx4TEnL0