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 ...

They are known as the three trigonometric ratios because they show how large one side is compared to the other based on an angle Ɵ. Practise trigonometric ratios in similar right angled triangles ...