The function f(x) = 1 + |sin x| is
Answer & explanation
Correct answer: option 2
$f(x) = 1 + |\sin x|$
so for $\sin x ≥ 0 ⇒ f (x) = 1 + \sin x$
$\sin x ≤ 0 ⇒ f(x) = 1 − \sin x$
for $\underset{x→0^+}{\lim}f(x)=1$
$\underset{x→0^-}{\lim}f(x)=1$
so f(x) is continuous for all $x∈R$