Question

$\int\limits\frac{e^x(1+x)}{cos^2(e^ x x)}\, dx$ equals
(A) $- cot (ex^x) + C$
(B) $tan (xe^x) + C$
(C) $tan (e^x) + C$
(D) $cot (e^x) + C$

Answer 1

check the attachment