A ladder leaning against a wall makes an angle of $$60^\circ...

Question Analysis
This problem evaluates the application of the sine function in a real-world context.

Key Concept Explanation
The sine of an angle in a right triangle is the ratio of the length of the opposite side to the hypotenuse.

Step-by-step Solution
1. Identify the given information: Angle = , Hypotenuse = 15 meters.
2. Use the sine function: .
3. Recall that .
4. Set up the equation: