Geometry

Question Analysis

The main focus of this question is to test the understanding of the definition of the cotangent trigonometric ratio in a right - triangle.

Key Concept Explanation

In a right - triangle, for an acute angle , the cotangent (cot) is defined as the ratio of the length of the side adjacent to the angle to the length of the side opposite the angle. That is, .

Step - by - Step Solution

This is a knowledge - recall question. We simply need to remember the definition of the cotangent function. There is no calculation step involved.

Option Analysis

A.Cot = : This is the formula for the tangent function (), not cotangent, so it is incorrect.

B.Cot = : This is the formula for the secant function (), not cotangent, so it is incorrect.

C.Cot =

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