Question 9
Which of the following describes the largest subset of values of $y$ within the closed interval $[0, \pi]$ for which $$
\sin(x + y) \le \sin(x) + \sin(y)
$$ for every $x$ between $0$ and $\pi,$ inclusive?
\sin(x + y) \le \sin(x) + \sin(y)
$$ for every $x$ between $0$ and $\pi,$ inclusive?