Is f(x)=sinx concave or convex at x=pi/2?
1 Answer
See below
Explanation:
to even find concavity, you should know what it means by concave up and concave down.
if a functions
graph{y=9x [-10, 10, -5, 5]}
then its concave-Up
if a functions
graph{-27x [-10, 10, -5, 5]}
then its concave-Down
but all of these points and graphs are linear, your looking for an point on an non-linear graph
the second derivative of
here's the graph:
graph{-sin(x) [-10, 10, -5, 5]}
at