" 27.If "A=(1)/(9)[[-8,1,4],[4,4,7],[1,-8,4]]," prove that "A^(-1)=A^(T)

If A=1/9[[-8,1,4],[4,4,7],[1,-8,4]], show that A^-1=A'.

If A= (1)/(9) ((-8,1,4),(4,4,7),(1,-8,4)) , prove that, A^(-1)= A^(T) . Hence solve the following system of equations: -8x + y + 4z= 0, 4x + 4y + 7z= 18, x- 8y + 4z= 9

If A = 1/9 [(-8,1,4),(4,4,7),(1,-8,4)] , show that A^-1 = A'

.If A=[[1,4,7],[2,5,8]] and B=[[-3,4,0],[4,-2,-1]] then show that (A+B)^T=A^T+B^T

Prove that: cos4A=1-8cos^(2)A+8cos^(4)A

If A=[[3,9,0],[1,8,-2]] and B=[[4,0,2],[7,1,4]] ,find A+B and A-B .

If A={1,2,3,4,5,6,7,8} and B={1,3,4,6,7,8,9} then

If A=[[ 1 ,4 , 7 ] , [2 , 5 , 8 ]] and B=[[-3, 4 , 0 ],[ 4 ,-2 , -1 ]] then show that ( A + B )^T = A^T + B^T

if A = [[3,9,0],[1,8,-2]] and B = [[4,0,2],[7,1,4]] find A+B and A-B?