CUET Preparation Today
| 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
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| 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) |
