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Answer 1

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Answer 2

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〽⭐INTEGRATION ⭐〽

⭐Substitution :-

↪X^2 + 1 = t

↪2x dx = dt


⭐identities used

↪Sin2x = 2sinxcosx

↪1-cost = 2sin^2(t/2) and 1+cost= 2cos^2(t/2 )