Hi Can anyone help me with this integration. I will use I to symbol the integer sign Limits between 1 and 0 Ie^-x.Sinxdx I understand I have to integrate by parts and get the following answer, ignoring the limits for the time being. Ie^-x.Sinx = e^-x.Cosx I -Cosx.e^-x dx then i believe i have to integrate the second part of the sum ( I -Cosx.e^-xdx)and i get. I -Cosx.e^-xdx= -Cosx.-e^-x- I -e^-x.Sinx Now i am stuck. How do I combine the two answers to get a single sum which i can then put between limits.?? Thank you.