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MHT CET202410 May 2024Evening ShiftMathematicsMatricesActual

Inverse of the matrix [ array cc 0.8 & -0.6 0.6 & 0.8 array ] is

Options

  1. A[ array cc 0.8 & 0.6 -0.6 & 0.8 array ]
  2. B[ array ll -0.8 & 0.6 -0.6 & 0.8 array ]
  3. C[ array cc -0.8 & -0.6 0.6 & 0.8 array ]
  4. D[ array cc 8 & -6 6 & 8 array ]

Correct answer

A. [ array cc 0.8 & 0.6 -0.6 & 0.8 array ]

Step-by-step solution

array rlrl & Let A= [ array cc 0.8 & -0.6 0.6 & 0.8 array ] & & | A | & = | array cc 0.8 & -0.6 0.6 & 0.8 array | & & =0.64+0.36 & =1 0 & & A⁻¹ & = [ array cc 0.8 & 0.6 -0.6 & 0.8 array ] array

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