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hello this is a plane trigonometry question hopefully you can help I did every thing else it's just the last one I can't get the reference angle for five in this question

Hello This Is A Plane Trigonometry Question Hopefully You Can Help I Did Every Thing Else Its Just The Last One I Cant Get The Reference Angle For Five In This class=

Sagot :

[tex]\theta=\frac{71}{36}\pi[/tex]