The user has provided an image containing mathematical notation and symbols. I need to analyze this content and present it in a structured JSON format, adhering to the specified schema. The image contains the letter 'D', followed by two equations: $$\alpha = 60^\circ$$ and $$\beta = 30^\circ$$. Below these equations, there's a fraction line and the letter 'n'. A vertical line is drawn to the right of these elements. The overall context suggests a mathematical problem, likely from a physics or geometry lesson, given the Greek letters often used for angles and other physical quantities.