this means that we will be in the two quadrants where the sine function is negative, ie the third and fourth quadrants. We need to firstly find the acute angle to use with the rules in these ...

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