An understanding of the three trigonometric ratios and how to change the subject of a formula is essential ... \(a\) and \(h\) to give cos(49) = 11/\(x\). To remove \(x\) from the denominator ...

Let’s look at how to use trigonometric identities to calculate missing sides. \({sin~θ} = \frac {opposite} {hypotenuse}\) \({cos~θ} = \frac {adjacent} {hypotenuse ...