Mathematics Education Trigonometry lesson 10 – sine and cosine of angles bigger than 90 degrees By Magic Monk on Sunday, October 14, 2018 In this lesson we talk about how to obtain values for sine and cosine bigger than 90 degrees and the reasoning behind those values. education mathematics steemiteducation steempress steemstem Previous Post Next Post Related Posts Mathematics Education Vector applications question – Elastic collision, momentum, and kinetic energy Mathematics Education Vectors lesson 21 – Basic vector operations in Geogebra Mathematics Education Vectors lesson 20 – drawing vectors in Geogebra