How to find a referance angle when its not given

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Reference no: EM131892136

Find the reference angle for each.

(a) - π/ 4

reference angle  _______radians

(b) 9π /4

reference angle  _______ radians

Iam still confused how to find a referance angle when its not given in degrees and then also when you have to convert it to radians.

Reference no: EM131892136

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