16S3: AM Trigonometry lesson 12 - R-formula by Gary Ang | Sep 5, 2016 | 16S3, Board-casts | 0 comments [vimeography id="658"] We finished up A. Math trigo in this lesson. We started discussion on cumulative frequency curve. Submit a Comment Cancel replyYour email address will not be published.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