\(\mathop \smallint \limits_0^{\frac{\pi }{2}} \mathop \smallint \limits_0^{\frac{\pi }{2}} \sin \left( {x + y} \right)dxdy\) is

\(\mathop \smallint \limits_0^{\frac{\pi }{2}} \mathop \smallint \limi

1.	\(\mathop \smallint \limits_0^{\frac{\pi }{2}} \mathop \smallint \limits_0^{\frac{\pi }{2}} \sin \left( {x + y} \right)dxdy\) is
A.	0
B.	π
C.	\(\frac{\pi }{2}\)
D.	2
Answer» E.

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\(\mathop \smallint \limits_0^{\frac{\pi }{2}} \mathop \smallint \limits_0^{\frac{\pi }{2}} \sin \left( {x + y} \right)dxdy\) is

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