Question

On the unit circle, which of the following angles has the terminal point coordinates

Answer 1

`\begin{gathered} \text{Let the angle be }\theta \\ \text{Hence,} \\ \theta=tan^(-1)((y)/(x)) \\ \end{gathered}`

In this case,

`y=-\frac{\sqrt[]{2}}{2}\text{ and x=-}\frac{\sqrt[]{2}}{2}`
`\theta=\tan ^(-1)(1)=45^o,225^o`

Since x is negative, and y is negative

`\theta=225^o`