If I=int(-pi)^pi e^(sinx)/(e^(sinx)+e^(-sinx))dx, then I equals (A) pi/2 (B) 2pi (C) pi (D) pi/4
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An elementary course of infinitesimal calculus . nts A, B, A, B areE, F, E, F, respectively. Ex. 3. To find the evolute of a cycloid. At any point P on the
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