Question

∫(sinx × cos2nx)dx

Answer 1

hi,
i suppose the answer should be this...........
integral sin(x) cos(2 n x) dx = (2 n sin(x) sin(2 n x)+cos(x) cos(2 n x))\/(4 n^2-1)+constant

Answer 2

\[\int\limits_{}^{}sinxcos2nx=1/2n*\sin2nx*sinx-1/2n \int\limits_{}^{}\sin2nx*cosxdx .Finish the problem using integration by parts..\]

Answer 3

Finish the problem using integration by parts.