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Recent questions tagged determinants
+3
votes
1
answer
Let A be a non-singular matrix of the order 2 x 2 then |A^-1| = (a) |A| (b) 1/|A| (c) 0 (d) 1
asked
Apr 7, 2019
in
Class 12
by
kratos
matrices
determinants
bseb model set
class-12
applications of matrices and determinants
+1
vote
1
answer
Show that the equations 2x + 6y + 11 = 0, 6x + 20y - 6z + 3 = 0 and 6y - 18z + 1 = 0 are not consistent.
asked
Apr 6, 2019
in
JEE
by
kratos
jee
matrices
determinants
jee mains
class-12
three dimensional geometry
+3
votes
1
answer
If A = [(-1,3/2),(-1/2,1/2)], then A^3 =
asked
Apr 6, 2019
in
Class 11
by
kratos
class-11
matrices
determinants
+1
vote
1
answer
If A = [( 1 2), (4 1), (5 6)] , B = [(1 2), (6 4), (7 3)] , then verify that :
asked
Apr 6, 2019
in
Class 12
by
kratos
determinants
class-12
class-11
matrices
+3
votes
1
answer
By using elementary operations, find the inverse of the matrix A = [(1, 2), (2, -1)]
asked
Apr 6, 2019
in
JEE
by
kratos
cbse
jee
matrices
determinants
jee mains
class-12
+3
votes
1
answer
There are two circles x2+y2=9 and x2+y3-8x-6y+n2=0.
asked
Apr 6, 2019
in
Class 12
by
kratos
class-11
matrices
class-10
determinants
coordinate geometry
class-12
complex numbers
+3
votes
1
answer
Prove the follow using properties [(α, α^2, β + α), (β, β^2, γ + α),(γ, γ^2, α + β)] = (β - α)(γ - α)(α - β)
asked
Apr 6, 2019
in
JEE
by
kratos
jee main 2021
class-11
jee
transformation formulae
determinants
class-10
jee main
class-12
polynomials
+2
votes
1
answer
Let A =[(3,2,5),(4,1,3),(0,6,7)] Express A as sum of two matrices such that one is symmetric and the other is skew symmetric.
asked
Apr 6, 2019
in
Class 12
by
kratos
class-11
matrices
class-12
determinants
+2
votes
1
answer
A straight line through a fixed point (2, 3) intersects the coordinate axes at distinct points P and Q.
asked
Apr 5, 2019
in
JEE
by
kratos
jee mains 2018
jee
matrices
jee mains 2019
determinants
jee mains
coordinate geometry
+2
votes
1
answer
Given that tan α and tan β are roots of x^2 – px + q = 0, then value of sin^2(α + β) =
asked
Apr 5, 2019
in
JEE
by
kratos
jee
quadratic equations
matrices
class-9
determinants
jee mains
+1
vote
1
answer
The points of contact of the vertical tangents to x = 2 – 3 sinϕ, y = 3 + 2 cosϕ are
asked
Apr 5, 2019
in
JEE
by
kratos
straight lines
cbse
trigonometry
class-11
jee
matrices
determinants
class-10
jee mains
triangle
+3
votes
1
answer
Show that |(-a^2, ab, bc), (ab, - b^2, bc), (ac, bc, - c^2)| = 4a^2b^2c^2
asked
Apr 3, 2019
in
Class 12
by
kratos
cbse
class-11
matrices
determinants
class-12
+2
votes
1
answer
If f(x) = |((1 + 3x)^m, (1 + 5x)^m, 1), (1, (1 + 3x)^m, (1 + 5x)^n), ((1 + 5x)^n, 1, (1 + 3x)^m)|, a, b
asked
Apr 3, 2019
in
JEE
by
kratos
class-11
jee
matrices
determinants
jee mains
+2
votes
1
answer
If A = [(1,2),(2,1)], then adj (A) = (A) [(1,-2),(-2,1)] (B) [(2,1),(1,1)] (C) [(1,-2)(-2,-1)] (D) [(-1,2),(2,-1)]
asked
Apr 3, 2019
in
Class 12
by
kratos
determinants
class-12
bseb model set
+1
vote
1
answer
If A = [(i, 0, 0), (0, i, 0), (0, 0, i)], i = √-1, then A^n = I where I is unit matrix when n = ...
asked
Apr 2, 2019
in
JEE
by
kratos
class-11
jee
matrices
determinants
jee mains
+2
votes
1
answer
Find the value of x, y, z if [(2x+y, x-y)(x-z, x+y+z)] = [(10,-1)(2,8)].
asked
Apr 2, 2019
in
Class 12
by
kratos
class-11
matrices
determinants
class-12
+1
vote
1
answer
Show that a/sinA + b/sinB + c/sinC = 2R where R is the circumcentre of ΔABC
asked
Apr 1, 2019
in
JEE
by
kratos
properties of triangles
jee
vectors
matrices
determinants
jee mains
class-12
+2
votes
1
answer
If Δ1 = |(a^2 + x^2, ab - cx, ac + bx), (ab + cx, b^2 + x^2, bc + ax), (ac - bx, bc - ax, c^2 + x^2)|
asked
Mar 31, 2019
in
JEE
by
kratos
matrices
determinants
jee
jee mains
+3
votes
1
answer
If matrix A = [1,2,3], then write AA'.
asked
Mar 31, 2019
in
Class 12
by
kratos
class-11
matrices
class-12
determinants
+2
votes
1
answer
If A = [(1,2,2),(2,1,2),(2,2,1)] then verify A^2 - 4A - 5I = 0.
asked
Mar 31, 2019
in
Class 12
by
kratos
determinant
adjoint
inverse of a matrix
class-11
matrices
determinants
class-12
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