The trigonometric ratios for the angles 30°, 45° and 60° can be calculated using two special triangles. An equilateral triangle with side lengths of 2 cm can be used to calculate accurate ...

This is written as a fraction. Image caption, These three equations are true for all right-angled triangles. They are known as the three trigonometric ratios because they show how large one side ...

Sine and cosine are ratios that are defined in the context of a triangle's right angle, and they can be presented according ...

To visualize the trigonometric functions for these angles we draw imaginary right triangles in which one side has a length of 0. The triangle for 0 degrees is shown in Figure 20.55. From Figure 20.55 ...