Question

To calculate that the equation y = x^2 cosx has a root between 1 and 1.2 radians.

Answer 1

When I substitute 1 and 1.2 in the equation, both come out positive, which says there isnt a root between the points? Whats going wrong?

Answer 2

you're correct, there isn't one, check the graph

Answer 3

There appears to be a critical points between 1 and 1.2.
But no root. Hmm.

https://www.desmos.com/calculator/pdf2xnhzf4

Answer 4

Ok, all fixed, I was using the wrong equation. Thanks guys