If m, n are integers and m + n is odd then the value of \(\mathop{\int }_{0}^{\pi }\sin mx.\cos nx.dx\) is

If m, n are integers and m + n is odd then the value of \(\mathop{\int

1.	If m, n are integers and m + n is odd then the value of \(\mathop{\int }_{0}^{\pi }\sin mx.\cos nx.dx\) is
A.	0
B.	π/2
C.	π
D.	1
Answer» B. π/2

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If m, n are integers and m + n is odd then the value of \(\mathop{\int }_{0}^{\pi }\sin mx.\cos nx.dx\) is

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