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AP EAPCET 16th May 2023 Shift 2 Solved Paper

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Question : 3

Total: 160

Let A=(

−cot‌θ	cosec‌θ
cosec‌θ	−cot‌θ

). If A−1=A at θ=θ1 and A−1+A=0 at θ=θ2, then which one of the following is True?

θ1=‌
π
2
,θ2=π
θ1=‌
π
2
, such θ2 does not exist
θ1=‌
π
4
,θ2=‌
π
2
such θ1 does not exist, θ2=π

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