Label the sides of the triangle \(o\), \(a\) and \(h\). Next choose the correct ratio from \(s^o_h~c^a_h~t^o_a\). The length \(h\) is known and the length \(o\) must be calculated. Label the sides ...

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 ...