Best method of entry.

[NewMC]

Thanks for the response roadrunner. Alpha was given and I have already solved for beta > pi by setting wt=beta (in i(wt)) and i(wt)=0. Now I'm just looking for the best way to input into the calculator the following in order for the calculator to solve it:

integral i(wt) dwt from 0.785 to 3.785

So: integral (6.78*sin(wt-0.646)-2.67e^-(wt/0.754)) dwt from 0.785 to 3.785

Does this help to clear up what I'm looking for?

It looks like this is close to what you've done but when I input the first line from your picture: ii:=(wt)->(xxx) in Function/CAS I get an unspecified error, when I choose OK it puts the cursor between the first w and t in the statement. Maybe there is something wrong with my key sequence for the input? Keystrokes: alpha, i, alpha, i, shift, Vars, :, enter, shift, ., (), alpha, w, alpha, t, right on directional pad, shift, 9, right arrow, (), then input expression.