What is the integral of integral of cos(x+y) ?

The integral of integral of cos(x+y) is Cy-cos(x+y)+C

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integral of integral of cos(x+y)

\int \int cos (x + y) d x d y

C y - cos (x + y) + C

Solution steps

\int \int cos (x + y) d x d y

\int cos (x + y) d x = sin (y + x) + C

= \int (sin (y + x) + C) d y

\int (sin (y + x) + C) d y = C y - cos (x + y) + C

= C y - cos (x + y) + C

\int \int sin (x + y) d x d y

\int \int (x + 2 y) d A

\int_{0}^{2} \int_{0}^{1} s + t d s d t

\int \int (x^{2} - y) d x d y

\int \int 6 x d x d x

What is the integral of integral of cos(x+y) ?
The integral of integral of cos(x+y) is Cy-cos(x+y)+C