How do you sketch the angle $(5pi)/4$ and find its reference angle?

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Answer 1 · 2018-04-24T01:37:31

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The reference angle is $45^o$

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On the unit circle every $45^o$ is equal to $pi/4$
So $(5pi)/4$ is equal to $225^o$

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However the reference angle is always taken from degree from the $x$ axis
This makes the reference angle $45^o$

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How do you sketch the angle (5pi)/4(5pi)/4 and find its reference angle?