Mathematics Education Pythagorean Trig Identity proofs By Magic Monk on Monday, October 22, 2018 In this tutorial we talk about some more Trig identity proofs, including: tan(x) = sin(x) / cos(x) sin^2(x) + cos^2(x) = 1 tan^2(x) + 1 = sec^2(x) cot^2(x) + 1 = cosec^2(x) 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