The adjacent side (\(a\)) is next to the angle in question (\(x\)). The trigonometric ratios for the angles 30°, 45° and 60° can be calculated using two special triangles. An equilateral ...

These two fractions are equivalent and both equal 0·6. No matter how much the triangle ... They are known as the three trigonometric ratios because they show how large one side is compared ...