If A=[\table 0 , -\tan (\frac{\theta}{2}) ; \tan (\frac{\theta}{2}) , 0] and (I_{2}+A)(I_{2}-A)^{-1}=[\table a , -b ; b , a], then 13(a^{2}+b^{2}) is ......... . [25 Feb 2021 Shift 1]

JEE Main 25 Feb 2021 Shift 1 Solved Paper

Section: Mathematics

Question : 86 of 90

Marks: +1, -0

If A=[

−tan(‌

)

tan(‌

)

] and (I2+A)(I2−A)−1=[

a	−b
b	a

], then 13(a2+b2) is ......... .

[25 Feb 2021 Shift 1]

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