The
graph appears to show three real solutions:
The only question might be Does it "wiggle around" near x = 0"? But x^3 and sinx both become negative on the negativex side and positive on the positivex side, and x^2 and cos x are also even functions. The function goes down both to the left and the right of the yaxis and is an even function.
So there are indeed three distinct real roots.

Posted by Charlie
on 20180424 12:52:29 