Mathematics Education Proving Trig Identities practice question 3 By Magic Monk on Thursday, October 25, 2018 Another tutorial on how to prove trig identities with 2 practice questions. The questions are: 1) 3sin^2x-2cos^2x=5sin^2x-2. 2) cos^2x+tan^2x=sec^2x-sin^2x. Have a go then come and see the answer! 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