My Crown Molding Will Angle To Wall&ceiling How Do You Determine The Corner Cut?

Place the molding "upside down" on the miter box with the good side facing you. The rear fence of the miter saw will represent your wall and the base of the saw will represent your ceiling. If you're cutting for a 90 degree inside corner, set the saw for 45 degrees. Although crown looks easy there are quite afew tricks to getting it just right. The best advice I can give you is; if you can't hire a professional to do it, maybe you can get one to show you how.

Crown moulding is tough!  I would recommend cheater corners.  They sell them at Lowes.  You don't have to know how to cut the corners when you use them.  Have fun!