If `intsqrt(1+sinx)f(x)dx=2/3(1+sinx)^(3/2)+c ,t h e nf(x)e q u a l` `cosx` (b) `sinx` (c) `tanx` (d) 1

"If " int sqrt(1+sinx) f(x)dx=(2)/(3)(1+sinx)^(3//2)+c, " then " f(x) " equals "

intsqrt((1-sinx)/(1+sinx)dx

intsqrt((1+sinx)/(1-sinx))dx=

int(e^(-x/2)sqrt(1-sinx))/(1+cosx)dx

int((1+cosx))/((x+sinx)^(3))dx

int(e^x(1-sinx))/(1-cosx)dx

int(1+sinx)/((x-cosx)^(3))dx=

intx^2/(xsinx+cosx)^2dx=-(xsecx)/(xsinx+cosx)+f(x)+c , then f(x) may be (A) sinx (B) xsinx (C) tanx (D) cotx