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/2 23. If f(0) = arctan ((sin x)/3), then I f'(x) dx = JO (A)( (B) (C) (D1 (E) none of (A) to (D)
plet +1 24. Jo et + to (A)1 (B) In (e +1) (C) (D)1-e (E) none of (A) to (D)
