Trigonometric Ratios
In this tutorial I show you how you can calculate the exact values of sin, cos and tan of 30°, 45° and 60° without a calculator by memorising some basic triangles as seen in the video.
30°, 45° and 60° Trig ratios
In this tutorial I show you how you can calculate the sin, cos and tan of multiples of 30°, 45° and 60° without a calculator.