Prove that cosh2x=2cosh^(2)x-1...

Prove that `cosh2x=2cosh^(2)x-1`

Text Solution

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The correct Answer is:

`2coh^(2)x-1`

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Knowledge Check

cosh^(-1)(1)=

A

2

B

3

C

`log_(e )(1+sqrt(2))`

D

0

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