This video explains how to find the exact values of trig functions such as sine, cosine, and tangent using the 30-60-90 and 45-45-90 reference triangles and using SOHCAHTOA. Trigonometry - Free Formula Sheet: https://www.video-tutor.net/formula-s... Trigonometry Video Lessons: https://www.video-tutor.net/evaluatin... Final Exam and Test Prep Videos: https://bit.ly/41WNmI9