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If tan x/2 "coth"x/2 =1, then cos x cosh...

If `tan x/2 "coth"x/2 =1`, then cos x cosh x =

A

`1`

B

`-1`

C

`cos^2 x`

D

`sinh^2 x`

Text Solution

Verified by Experts

The correct Answer is:
A
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