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Is the function $f(x)=x^{2}-\sin x+5$ continuous at $x=\pi$ ?

Solution:

The provided function is $f(x)=x^{2}-\sin x+5$

Left Hand Limit $=\lim _{x \rightarrow z^{-}}\left(x^{2}-\sin x+5\right)=\lim _{x \rightarrow n^{-}}\left[(\pi-h)^{2}-\sin (\pi-h)+5\right]=\pi^{2}+5$

Right Hand Limit $=\lim _{x \rightarrow-^{-}}\left(x^{2}-\sin x+5\right)=\lim _{x \rightarrow \pi^{-}}\left[(\pi+h)^{2}-\sin (\pi+h)+5\right]=\pi^{2}+5$

And $f(\pi)=\pi^{2}-\sin \pi+5=\pi^{2}+5$

As L.H.L. $=$ R.H.L. $=f(\pi)$

As a result, $f$ is continuous at $x=\pi$