Geometry

Question Analysis

This question focuses on applying trigonometric functions in a right - triangle. The main task is to determine the correct trigonometric ratio to find the length of side given an angle and the length of the hypotenuse.

 

Key Concept Explanation

In a right - triangle:

 

Step - by - Step Solution

In right - triangle , , the hypotenuse , and the side (i.e., ) is the side opposite to the angle.

Using the sine function, since , substituting , , and , we get .

 

Option Analysis

A.Cos

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