Each trigonometric function also has an inverse that can be used to find an angle from a ratio of sides. The inverses of sin(x), cos(x), and tan(x), are arcsin(x), arccos(x) and arctan(x ...

An inverse function takes the output and ... The only equation that contains both \(o\) and \(h\) is the sine (sin) ratio. Practise finding angles in right-angled triangles with this quiz.

The angles are labelled with capital letters. The opposite sides are labelled with lower case letters. Notice that an angle and its opposite side are the same letter. The sine rule is: \(\frac{a} ...