The value of the integral \[\int_{-\pi }^{\pi }{{{(\cos ax-\sin bx)}^{2}}dx}\], (a and b are integer) is [UPSEAT 2001]

The value of the integral \[\int_{-\pi }^{\pi }{{{(\cos ax-\sin bx)}^{

1.	The value of the integral \[\int_{-\pi }^{\pi }{{{(\cos ax-\sin bx)}^{2}}dx}\], (a and b are integer) is [UPSEAT 2001]
A.	\[-\pi \]
B.	0
C.	\[\pi \]
D.	\[2\pi \]
Answer» E.

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The value of the integral \[\int_{-\pi }^{\pi }{{{(\cos ax-\sin bx)}^{2}}dx}\], (a and b are integer) is [UPSEAT 2001]

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