Question

please someone integrate sinaxcosax

Answer 1

use the identity
\(\sin 2\theta =2 \sin \theta \cos\theta \)

Answer 2

thanks but can the identity help to integrate the function? please integrate it for me

Answer 3

can you integrate sin theta ?

Answer 4

because if you can,
sinaxcosax is just (1/2) sin 2ax
then you are left with
\((1/2)\int \sin(2ax)dx\)
which is pretty simple to integrate

Answer 5

yes i can integrate that.Thanks and why cant we use the substitution method to integrate Xe^6x?

Answer 6

you mean \(\int xe^{6x}dx\)
?
because even after u substitute, you'll still need integration by parts....so no use..