Question

1)integral xcos(1x+y) dx help please

Answer 1

i dunno. but i love ur prophile photo!

Answer 2

check your statement.

Answer 3

\[\int\limits x \cos (1^x+y) dx? \]

Answer 4

\[\int\limits_{0}^{\pi/4}\int\limits_{0}^{\pi/6}xcos(1x+y) dxdy\] its a double integral

Answer 5

switch it to dydx

Answer 6

isn't 1x just x?

Answer 7

\(\int\limits_{0}^{\pi/4}\int\limits_{0}^{\pi/6}xcos(1x+y) dxdy =

\int\limits_{0}^{\pi/6} \left(\int\limits_{0}^{\pi/4} xcos(1x+y) dy\right )dx\)

Answer 8

lol yes, i think the integrand has to be "xcos(x+y)"

"xcos(1x+y)" makes me feel it has a typo or something..

Answer 9

nope there is no typo its a webwork question

Answer 10

okay, reverse the order and evaluate ?

Answer 11

Use integration by parts - sub. u=x; dv=cos(x+y)dy.