If $A=\begin{bmatrix} cos\alpha & -s - CUETMOCK

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Home Questions NJV64V8YNY

Target Exam

CUET

Subject

-- Mathematics - Section B2

Chapter

Algebra

Question:

If $A=\begin{bmatrix} cos\alpha & -sin \alpha \\sin \alpha & cos\alpha \end{bmatrix}$, then AA' is :

Options:

$A^2$

Null matrix

A

Identity matrix

Correct Answer:

Identity matrix

CUET Questions