Best method of entry.

[roadrunner]

(02-24-2016 04:03 PM)NewMC Wrote:  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

Do you have the latest firmware version? Try it this way:

ii(wt):=-2.67*e^(-1.32625994695*wt)+6.78*sin(wt-0.646)

Or just cut and paste the line above into the emulator.

then type or cut and paste:

∫(ii(wt),wt,0.785,3.785)

You should get the same answer as Terja

-road