20%, because if 65 is 100, then 52 is 80% out of 65; so 100 - 80 is 20
First solve for the trig function 'cot'

Next take the sqrt of both sides (include plus/minus)

Now take reciprocal of both sides, this will change trig function to 'tan'
(cot = 1/tan)

Finally use the unit circle or inverse tan on your calculator to find x.
There will be 4 solutions, one for each quadrant.
Answer:
8 and -4
Step-by-step explanation:
8*-4=-32
8+(-4)=4