Cove molding angle question

[Texas splinter]

Help!!! I am attempting to install crown molding (38 degree) to a cathedral ceiling and I can’t seem to be able to figure out the angles for the corners where the side walls meet the end walls.
The ceiling goes up at a 10 degree angle along the end walls.
Adding to my troubles is the fact that I am mathematically challenged.
I have a 10" sliding compound miter saw, but havn't used it very much up till now.
Can anyone offer any advice? (Other than to hire someone to come in and install the molding?)

Thanks in advance

[jcrenick]

Try this link:
http://www.garymkatz.com/TrimTechniq...dral-crown.htm

[Texas splinter]

Thanks a lot! I have bookmarked this site and studied it some, it will take more study and some test cuts, I'm sure.