Question

what is the reference angle of 810?

Answer 1

Use trigonometical formula of circular angle.

Answer 2

the definition of reference angle says that it should be acute. but when i get the reference angle of 810 degrees the answer is 90 which is not acute

Answer 3

\[0≥810°−n\times360°≥90°\]

Answer 4

so the answer is 90? even though it isn't acute?

Answer 5

YES!

Answer 6

thank you guys =)

Answer 7

90° is ok for a reference angle

Answer 8

WELCOME