roots and brackets not sure how to add errors to intervals for roots and I keep getting error

    How do plot with brackets for the interval of roots for given function? like sin(x)

[Jan]

Ok, this is the homework question. What have you tried so far and where did which problem occur?

[Walter Roberson]

I read the full problem before you trimmed down the description removing the complete code template that you are required to use.

You need to tell us what problem you are encountering and give us the context of the line you are encountering it on.