Question

integration of sin3x ? please show formula used

Answer 1

?

Answer 2

no formula, the anti derivative of sine is minus cosine

Answer 3

but the answer isn't -cos3x..

Answer 4

well no of course not
the derivative of \(-\cos(3x)\) is \(3\sin(3x)\)

Answer 5

you can fix that by dividing by 3

Answer 6

Ohhhhh is it where you use the gay chain rule thing ? I never learned that lol

Answer 7

it is sometimes called "u - sub" although "gay chain rule thing" might be just as descriptive
i would think it is more common sense

Answer 8

Ohh I see thanks ;D