Value of \(\rm \int {^{\frac \pi 2}_0} \int ^\pi_0 \cos (x + y) dx\;d – McqOptions

MCQOPTIONS

1.	Value of \(\rm \int {^{\frac \pi 2}_0} \int ^\pi_0 \cos (x + y) dx\;dy\) is-
A.	-2
B.	2
C.	0
D.	4
Answer» B. 2

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