Final answer:
The maximum value of y = sin(θ) for θ between -720° and 720° is 1, as the range of the sine function is from -1 to 1.
Step-by-step explanation:
The maximum value of y = sin(θ) for values of θ between −720° and 720° is 1. This is because the sine function, which represents periodic oscillations, has a range between -1 and 1. Regardless of the angle provided, the sine function cannot exceed these bounds. Since the question asks for the maximum value, the correct answer is b. 1.