16S3: EM Trigo lesson 2 - Cosine Rule by Gary Ang | May 15, 2016 | 16S3, Board-casts | 0 comments [vimeography id="523"] In this lesson, we recapped on the Sine Rule and introduced the Cosine Rule. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ