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If cosh 2 x= 99, then tanh x =...

If cosh `2 x= 99`, then tanh x =

A

`5//7sqrt2`

B

`7//5 sqrt2`

C

`5sqrt7 // 2`

D

`7 sqrt5 //2 `

Text Solution

Verified by Experts

The correct Answer is:
B
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