Identities for Sum and Differences of Sine and Cosine, Example 1

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! 🙂 https://www.patreon.com/patrickjmt !! Identities for Sum and Differences of Sine and Cosine, Example 1. In this video, I show how we can find other values of sine and cosine (besides the commonly memorized values) using sum and difference identities. For more free math videos, visit http://PatrickJMT.com

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