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 ...

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 ...

The three sides of a right-angled triangle have special names. The hypotenuse (\(h\)) is the longest side. It is opposite the right angle. The opposite side (\(o\)) is opposite the angle in ...