For this case, the first thing you should know is that the cotangent is the inverse function of the tangent.
We have then:
cot (x) = 1 / (tan (x))
Rewriting we have:
cot (x) = 1 / ((sin (x)) / (cos (x)))
We do double c:
cot (x) = cos (x) / sin (x)
Answer:
cot (x) = cos (x) / sin (x)
option 3
