Question

COMPREHENSION :
For the given vectors
Ā=2i^+j^-K^
B=i^-j^-K^
Ĉ= 2i^ +j^ +k^
Answer the following
6.
The magnitude of Ā+B-Cis:
(A) root10
(B) 2root3
(C)root11
(D)3
7.
The angle between B and C is:
(A)pi/6
(B) pi/2
(C)pi/3
(D)pi/4

8.
The vector CxB has a magnitude :
(A)root5
(B) root18
(C) 4
(D) 2root5​

Answer 1

Answer:

not sure but the ans is 1st ans - c ,2nd and. -a ,

3rd ans-c ,annd, 4th ans- b