The correct answer is:
cot θ = (cos θ)/(sin θ).
Step-by-step explanation:
We know that the tangent ratio is opposite/adjacent (O/A).
The ratio for sine is opposite/hypotenuse (O/H), and the ratio for cosine is adjacent/hypotenuse (A/H).
If we divide these two,

This is the same as the ratio for tangent, so we know that
tan θ = (sin θ)/(cos θ).
Since cot θ = 1/(tan θ), we now have
