### Identities for Sum and Differences of Sine and Cosine, Example 3

Identities for Sum and Differences of Sine and Cosine, Example 3. In this video, I show how we can find other values of tangent (besides the commonly memorized values) using sum and difference identities. For more free math videos, visit http://PatrickJMT.com (Yes, there is a formula for tangent as well, but here I wanted to stress the sine/cosine formulas!)

Length:
06:09