Question

integrate x.cos(2x^3 +1)

Answer 1

hmm what have you tried so far?

Answer 2

I was going to say substitution but that still doesn't fixed the problem

Answer 3

x=u cos(2x^3+1)dx= dv
1dx=du but then I cant figure out the integration of cos(2x^3+1)

Answer 4

no I was going to say u = 2 x^3 + 1 and du= 6x^2
gives you sin(u) x/6 du
but you still have an x there

Answer 5

thank you i've managed I said U=2x^3+1 then it all came up thanx