[" 40.If "0<=x<=pi,81^(sin^(2)x)+81^(cos^(2)x)=30" then "x=],[[" 1) "(pi)/(6)," 2) "(pi)/(4)," 3) "(pi)/(15)," 4) "(pi)/(8)]]

If A=[[a, 0, 0], [0, a, 0], [0, 0, a]] , then |A||adjA|=

If A=[[a, 0, 0], [0, a, 0], [0, 0, a]] , then |adjA|=

Out of the following matrices, choose that matrix which is a scalar matrix: a) [(0 ,0),( 0, 0)] (b) [(0, 0, 0),( 0 ,0, 0)] (c) [(0, 0),( 0, 0),( 0 ,0)] (d) [(0),(0),( 0) ]

If A=[[2, 0, 0], [0, 2, 0], [0, 0, 2]] , then A^(5)=

If A=[[0, 1, 0], [1, 0, 0], [0, 0, 1]] , then A^(-1)=

If A=[[3, 0, 0], [0, 3, 0], [0, 0, 3]] , then |A||adjA|=

If A=[[2, 0, 0], [0, 2, 0], [0, 0, 2]] , then A^(6)=

If A={:[(0,0,0),(0,0,0),(1,0,0)]:} , then

If A = [{:( 0,0,0),(0,0,0) ,(0,1,0):}] ,then A is

If A={:[(a,0,0),(0,a,0),(0,0,a)],:}" then: "|A|*|adj.A|=