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If cos2B=(cos(A+C))/(cos(A-C)), then tan...

If `cos2B=(cos(A+C))/(cos(A-C))`, then tan A, tan B, tan C are in

A

`cosAcosB=(2)/(5)`

B

`sinAsinB=(2)/(5)`

C

`cosAcosB=-(1)/(5)`

D

`sinAsinB=-(1)/(5)`

Text Solution

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The correct Answer is:
B
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