Question

Check all that apply. π/4 is the reference angle for:

A. 19π/4
B. 12π/4
C. 7π/4
D. 15π/4

I just want to check from my calculations the answers would be A., C. and D.

Not B. (12π/4) because I think that the reference angle is 3π radians.

Please let me know. Thank you!

Answer 1

7pie/4 is one them

Answer 2

so c. is one I'm just thinking b. is not included in the answer??

Answer 3

c,d,a

Answer 4

so just like I thought??

Answer 5

yeh

Answer 6

thank you for your help :)