What are the direction cosines to the normal plane x+2y-3z+9=0?

-1/√14 ,- 2/√14 ,3/√10 1/√10 ,2/√10 ,3/√14 -1/√10 ,2/√14 ,1/√14 1/√14,2/√14 ,- 3/√14

1/√14,2/√14 ,- 3/√14

If directions of a plane are a , b , c then direction cosines are given by a/√(a^2+b^2+c2) ,b/√(a^2+b^2+c2) ,c/√(a^2+b^2+c2)