If A=[\table \sin \alpha , -\cos \alpha ; \cos \alpha , \sin \alpha] and A+A^{-1}=I, then \alpha=

AP EAPCET 06-Jul-2022 Shift 2 Paper

Section: Mathematics

Question : 5 of 160

Marks: +1, -0

If A=[

sin‌α	−cos‌α
cos‌α	sin‌α

] and A+A−1=I, then α=

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2sin‌α	0
0	2sin‌α