NDA Math Matrices

Question : 1 of 69

Marks: +1, -0

if If A=(

1	0	0
0	cos‌θ	sin‌θ
0	sin‌θ	−cos‌θ

), then which of the following are correct?
1. A+ adjA is a null matrix
2. A−1+ adja is a null matrix
3. A−A−1 is a null matrix
Select the correct answer using the code given below :

[NDA II 2022]

1 and 2 only
2 and 3 only
1 and 3 only
1,2 and 3

Validate

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