Is this question correct?
Find the exact cotangent of an angle with unit circle coordinates {-5/13, 12/13}
The possible answers are:
-12/5
13/12
-5/12
-13/5
I calculated arctan(arcsin(12/13)) and arctan(arccos(-5/13)) to equal 0.866.
However when I manually type 1/(tan(arccos(-5/13)) it equals 0.4166666 or 5/12. Is this enough to go one?

Question

Is this question correct?
Find the exact cotangent of an angle with unit circle coordinates {-5/13, 12/13}
The possible answers are:
-12/5
13/12
-5/12
-13/5
I calculated arctan(arcsin(12/13)) and arctan(arccos(-5/13)) to equal 0.866.
However when I manually type 1/(tan(arccos(-5/13)) it equals 0.4166666 or 5/12. Is this enough to go one?

anonymous · Answer

Wait i was being silly confusing arctan with cot right?