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IF alpha+beta=pi/2, then cosalpha cos be...

IF `alpha+beta=pi/2`, then cos`alpha` cos `beta` has a maximum value at `beta`=

A

(a) `pi/4`

B

(b) `pi/2`

C

(c) `pi/6`

D

(d) None of these

Text Solution

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The correct Answer is:
A
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