If \[A+B=\frac{\pi }{2},\] the maximum value of \[\cos A\cos B\]is [AMU 1999]

If \[A+B=\frac{\pi }{2},\] the maximum value of \[\cos A\cos B\]is [AM

1.	If \[A+B=\frac{\pi }{2},\] the maximum value of \[\cos A\cos B\]is [AMU 1999]
A.	\[\frac{1}{2}\]
B.	\[\frac{3}{4}\]
C.	1
D.	\[\frac{4}{3}\]
Answer» B. \[\frac{3}{4}\]

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If \[A+B=\frac{\pi }{2},\] the maximum value of \[\cos A\cos B\]is [AMU 1999]

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