This trigonometry video tutorial explains how to find the exact of trigonometric expressions with angles in radians and degrees using the sum and difference identities & formulas of sine and cosine. This lesson contains plenty of examples and practice problems that will help you to get a thorough understanding of this material.

Full 1 Hour Video on YouTube:    • Sum and Difference Identities of Sine...  
Get The Full 1 Hour Video on Patreon:   / mathsciencetutor  
Direct Link to The Full Video: https://bit.ly/3yqy8JL