An understanding of the three trigonometric ratios and function machines is essential ... the answer to adjacent ÷ hypotenuse (in this example, 16/32). cos⁻¹ is the inverse function of ...

An understanding of the three trigonometric ratios and how to change the subject ... the angle unit to 'degrees' (or 'deg.'). Here is an example of how to calculate the length of a side, \(y ...