Question: Can someone please help me with this? I have gotten to cosx > 5 Determine the open intervals on which the graph of f (x)

Can someone please help me with this? I have gotten to cosx > 5

Can someone please help me with this? I have gotten to cosx

Determine the open intervals on which the graph of f (x) = -x+ 5cost is concave downward or concave upward

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