Question

x^2 cos(xy) integrate?

Answer 1

with respect to what x or y

Answer 2

You can to integration by parts, however I prefer the Tabular Method:

let u = x^2 v= cos(x)
(until 0 is obtained)
Alternating Signs U and its derivatives V and its antiderivatives

+ x^2 cos(x)
- 2x sin(x)
+ 2 - cos(x)
- 0 - sin (x)

Now multiply diagonal terms and add:

int. (x^2cos(x) = + x^2sin(x) + 2xcos(x) - 2sin(x) + C
The Tabular Method can also be used for a few other integration problems. Try looking it up

Answer 3

with respect to y

Answer 4

nm i didnt see the xy*

Answer 5

\[xsin(xy)\]

Answer 6

how did u find it?

Answer 7

treat x as a constant (for example pretend it is a 2)
use then use u substitution

Answer 8

do you understand

Answer 9

yeah i got u thnx alot