[A=[[1,2],[3,4]]" थ्भ- "vec B=[[a,0],[0,b]],a,b],[in N,di]

Let {:A=[(1,2),(3,4)]and B=[(a,0),(0,b)]:},a,b in N Then,

Let A = ((1,2),(3,4)) and B = ((a,0),(0,b)), a b in N . Then :

Let A={:((1,2),(3,4):}) and B={:((a,0),(0,b)):} , where a,b in N , then

Let ((1,2),(3,4)) and B=((a,0),(0,b)), a, b epsilon N . Then

If A_(0) = [[2 ,-2,-4],[-1,3,4],[1,-2,-3]] and B_(0) [[-4,-4,-4],[1,0,1],[4,4,3]] and B_(n) = adj (B_(n-1)),n inN and I is an dientity matrix of order 3. det (A_(0) + A_(0)^(2) B_(0) ^(2) + A_(0)^(2) + A_(0) ^(4) B_(0)^(4) + ... upto 12 terms ) is equal to

If A=[(n,0 ,0),( 0,n,0),( 0, 0,n)] and B=[(a_1,a_2,a_3),(b_1,b_2,b_3),(c_1,c_2,c_3)] , then A B is equal to (A) B (B) n B (C) B^n (D) A+B

If A=[(n,0 ,0),( 0,n,0),( 0, 0,n)] and B=[(a_1,a_2,a_3),(b_1,b_2,b_3),(c_1,c_2,c_3)] , then A B is equal to (A) B (B) n B (C) B^n (D) A+B

If vec r. vec a=0, vec r. vec b=1 \ and \ [[ vec r ,vec a, vec b]]=1, vec adot vec b!=0,( vec adot vec b)^2-| vec a|^2| vec b|^2=-1, then find vec r in terms of vec a \ and \ vec b .

If vec a , vec b ,a n d vec c are such that [ vec a vec b vec c]=1, vec c=lambda vec axx vec b , angle, between vec aa n d vec b is (2pi)/3,| vec a|=sqrt(2),| vec b|=sqrt(3)a n d| vec c|=1/(sqrt(3)) , then the angel between vec aa n d vec b is pi/6 b. pi/4 c. pi/3 d. pi/2