Question

what is the reference angle of -9pi/7?

Answer 1

i got that it was 51 degrees, but i need to put that into radians

Answer 2

and im not quite sure how^

Answer 3

It's already in radians.

Answer 4

i need to put it in terms of pi.

Answer 5

In general,\[\pi = 180\]
so lets do the calculation:
\[\frac{ -9 \times 180 }{ 7 } \approx -231\]

Answer 6

-73.666

Answer 7

okay i that makes sense. but i need my answer to be in fraction form

Answer 8

here are my option choices.

Answer 9

so then -231,428571 degrees

Answer 10

yes..do you see my answer choices there? how is it that i put it into that form?