Question

need lots of help with u substitution

Answer 1

1) \[\int\limits_{}^{} \sin 7x dx\]

Answer 2

you dont need u-sub for this integral..

Answer 3

then what do i do?

Answer 4

\[\int sin(ax)dx = -\frac{1}{a}cos(ax)+c\]

Answer 5

Just use the formula!