Prove the irrationality of n² by expressing the integral In - = 6.² P(x) sin x dx as a linear combination of 1, ², 4, ..., n2n over Z, where 1 P(x) = x²n (π- x)²n (2n)!

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Q: and Then, what is the value of tan x + tan y = 1/1/ cot x + cot y = 1 x + y

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