Find intervals of concavity and points of inflexion for the following functions:𝑓(𝑥) = sin 𝑥 + cos 𝑥, 0 < 𝑥 < 2𝜋

Find intervals of concavity and points of
inflexion for the following functions:
$𝑓 (𝑥) = \sin 𝑥 + \cos 𝑥, 0 < 𝑥 < 2 𝜋$

Matching exercise

Match the items on the right to the items on the left.

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