1.

The solution to the given multiple integral is:\(\mathop \smallint \nolimits_0^{\frac{\pi }{2}} \mathop \smallint \nolimits_0^{\frac{\pi }{2}} \sin \left( {x + y} \right)dxdy\)

A. 4
B. 2
C. -2
D. π/2
Answer» C. -2


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