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Use the unit circle to find the value of tan 315°.

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The unit circle (radius is one unit) for the trigonometric function is,

The coordinate of point P is,


P(\frac{\sqrt[]{2}}{2},-\frac{\sqrt[]{2}}{2})

So value of tan 315 is,


\begin{gathered} \tan 315=\frac{-\frac{\sqrt[]{2}}{2}}{\frac{\sqrt[]{2}}{2}} \\ =-1 \end{gathered}

Answer: -1

Use the unit circle to find the value of tan 315°.-example-1
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