Question

Find integral of (e^x-cosxcosy + sinxsiny+ tan y) dy

Answer 1

the hard part is the cosxcosy and sinxsiny

Answer 2

Yes that the part that I don't know how to do it

Answer 3

Sure the signs are right?

Answer 4

Yes

Answer 5

This is an exact differential equation

Answer 6

Its not an integral??

Answer 7

No that is the integral of a first partial derivative that I need

Answer 8

The thing is I don't know how to take the integral of -cosxcosy and sinxsiny w.r.t dy

Answer 9

What if I turn the integral like this e^x-cos(x+y)+tan y dy

Answer 10

Is this help?

Answer 11

Is the integral of tan y =ln abs(cosy)??

Answer 12

Yes I was thinking of writing the integral that way.