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CBSE  /  Class 12  /  Maths  /  Determinants
  • 1. 
    If Δ = [102306] then A =

  • 0
  • 10
  • 12
  • 60
  • 2. 
    A = [αqqα] |A³| = 125 then α =

  • ±3
  • ±2
  • ±5
  • 0
  • 3. 
    The area of a triangle with vertices (-3, 0) (3, 0) and (0, k) is 9 sq. units. The value of k will be

  • 9
  • 3
  • -9
  • 6
  • 4. 
    Let f(t) = [cottt12sintt2tsinttt] then limt0 f(t)t2 is equal to

  • 0
  • -1
  • 2
  • 3
  • 5. 
    If A and B are invertible matrices, then which of the following is not correct?

  • adj A = |A|.A
  • det (a)= [det (a)]
  • (AB)= BA
  • (A + B)= B+ A
  • 6. 
    If x, y, z are all different from zero and

  • 7. 
    Evaluate the determinant Δ = |log3512log43log38log49|

  • 152
  • 12
  • 143
  • 6
  • 8. 
    |x7x5x+1|

  • 3x² + 4
  • x(5x + 8)
  • 3x + 4x²
  • x(3x + 4)
  • 9. 
    |cosθsinθsinθcosα|

  • 0
  • 1
  • 2
  • 3
  • 10. 
    |cos15sin15sin75cos75|

  • 0
  • 5
  • 3
  • 7
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