Question
Find the numbers at which $f$ is continuous. At which numbers is $f$ discontinuous?$f(x)=4 \sin x$
Step 1
The function $f(x) = 4 \sin x$ is a composition of two continuous functions: the sine function and the constant function $4$. Both of these functions are continuous everywhere, so their composition $f(x)$ is also continuous everywhere. Show more…
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