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If tan theta = "sec" theta = e^(x), then...

If `tan theta = "sec" theta = e^(x)`, then `cos theta` equals-

A

`(e^x + e^(-x))/2`

B

`2/(e^x + e^(-x))`

C

`(e^x - e^(-x))/2`

D

`(e^x - e^(-x))/(e^x + e^(-x))`

Text Solution

Verified by Experts

The correct Answer is:
B
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