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

To find Ɵ, calculate cos⁻¹ (16/32). Image caption, To write cos⁻¹ on a scientific calculator, press 'shift' and 'cos'. Then type 16/32 using ... sine (sin) ratio. Practise finding angles ...