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  • 2015| SET 3 - (ECE GATE Exam) - Previous Question Paper Solution
  • For A = $\begin{bmatrix} \ 1 & tan x \\ \ - tan x &am...
Multiple choice

For A = $\begin{bmatrix} \ 1 & tan x \ \ - tan x & 1 \ \end{bmatrix}$, the determinant of AT A-1 is

  1. sec2 x

  2. cos4 x

  3. 1

  4. 0

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A Correct answer
Explanation

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