Asked by kyu

Suppose that X is an angle in standard position and that X' is it's reference angle. If cosX = -4/ squareroot of 17. find the exact value of cosX'

is it 4/square root of 17?
Answered by Reiny
yes, X' would be in quadrant I, so its cosine would be positive.
cos X' = 4/√17
Answered by Kunaie
No
There are no AI answers yet. The ability to request AI answers is coming soon!