Question

how to find the reference angle for 570 degrees

Answer 1

First subtract 360.

Answer 2

i got 210 so then am i supposed to subtract 180?

Answer 3

180 or 270 your choice.

Answer 4

but why 270?

Answer 5

I dunno, he doesn't make sense...

reference angle is basically a angle closest to x-axis, in other word, smallest angle between your angle to x-axis.

note that 210 is already close to 180

so just find the difference between these angles.