It seems like you're referring to a question involving sine functions (sin) and trigonometric values. However, I'm unclear about the specific context or the equation you're working with.
Could you please provide more details or clarify the question? For instance, are you working on a specific trigonometric equation or problem where you have defined \( \sin z \), \( \sin x \), and \( \sin y \) or any specific values you're examining? That way, I can assist you better with how to substitute or use those values.