Trigonometry lesson 14 - radians, exact values, symmetry
In this lesson we use a combination of techniques that you have learned in previous lessons to find the exact values of trigonometric ratios for angles larger than 90 degrees.
Posted from my blog with SteemPress : http://magicmonktutorials.com/blog/2018/10/18/trigonometry-lesson-14-radians-exact-values-symmetry/