Below, express the reference angle θ′ in the same units (degrees or radians) as θ . You can enter arithmetic expressions like 210-180 or 3.5-pi.

Question

The reference angle of 100 is..

I tried 80 and it wasn't correct.

Answer 1

the reference angle for the second quadrant is θ'=180°-θ

you might try θ^'=180º-100° (yes, I know this is 80° but you said it was incorrect so maybe it is written in this form)