\[\int_{-\pi }^{\pi }{{{(\cos px-\sin qx)}^{2}}dx}\] is equal to (where \[p\] and \[q\] are integers) [IIT 1992]

\[\int_{-\pi }^{\pi }{{{(\cos px-\sin qx)}^{2}}dx}\] is equal to (wher

1.	\[\int_{-\pi }^{\pi }{{{(\cos px-\sin qx)}^{2}}dx}\] is equal to (where \[p\] and \[q\] are integers) [IIT 1992]
A.	\[-\pi \]
B.	0
C.	\[\pi \]
D.	\[2\pi \]
Answer» E.

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\[\int_{-\pi }^{\pi }{{{(\cos px-\sin qx)}^{2}}dx}\] is equal to (where \[p\] and \[q\] are integers) [IIT 1992]

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