Addition of angles formulas

Disclaimer: The material in the videos below comes mainly from outside City Tech. The presentation in these videos may differ from the one given in your class. Please consult with your instructor to confirm whether a particular approach is acceptable in your class.

  1. $\rhd$ Finding trigonometric values using angle addition formulas (8:34) Find $\sin\left(\dfrac{7\pi}{12}\right)$.
  2. * Practice: Find trigonometric values using angle addition formulas. (4 problems)