1.

Find the ∫∫x3 y3 sin⁡(x)sin⁡(y) dxdy$

A. (x<sup>3</sup> Cos(x) + 3x<sup>2</sup> Sin(x) + 6xCos(x)-6Sin(x))(y<sup>3</sup> Cos(y) + 3[y<sup>2</sup> Sin(y) – 2[-yCos(y) + Sin(y)]])
B. (-x<sup>3</sup> Cos(x) – 3x<sup>2</sup> Sin(x) – 6xCos(x)-6Sin(x))(-y<sup>3</sup> Cos(y) + 3[y<sup>2</sup> Sin(y) – 2[-yCos(y) + Sin(y)]])
C. (-x<sup>3</sup> Cos(x) + 3x<sup>2</sup> Sin(x) + 6xCos(x)-6Sin(x))(-y<sup>3</sup> Cos(y) + 3y<sup>2</sup> Sin(y) + 6yCos(y) – 6Sin(y))
D. (–x<sup>3</sup> Cos(x) + 6xCos(x) – 6Sin(x))(-y<sup>3</sup> Cos(y))
Answer» D. (‚Äö√Ñ√∂‚àö√ë‚àö¬®x<sup>3</sup> Cos(x) + 6xCos(x) ‚Äö√Ñ√∂‚àö√ë‚àö¬® 6Sin(x))(-y<sup>3</sup> Cos(y))


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