InterviewSolution
Saved Bookmarks
| 1. |
The unit vector perendicular to the plane determined by P (1,-1,2) ,C(3,-1,2) is ________. |
|
Answer» `hata= (VEC(PQ)xxvec(PR))/(|vec(PQ) XX vec(PR)|)` `vec(PQ) = hati-hatj -3hatk, vec(PR)= -hati+3hatj-hatk` `vec(PQ)xx vec(PR)=|{:(hati,hatj,hatk),(1,1,-3),(-1,3,-1):}|` ` 8hati + 4hatj + 4hatk` `|vec(PQ) xx vec(PR)|=SQRT(64+16+16)=sqrt96 + 4sqrt6` `hatn = (8hati+4hatj+4hatk)/(4sqrt6)=(2hati+hatj+hatk)/sqrt6` |
|