The value of (4cos^(2)9^(@)-1)(4cos^(2...

The value of `(4cos^(2)9^(@)-1)(4cos^(2)27^(@)-1)(4cos^(2)81^(@)-1)(4cos^(2)443^(@)243^(@)-1)` is

A

1

B

`-1`

C

2

D

none of these

Verified by Experts

The correct Answer is:

A

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