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The expression : ((a+b+c)(b+c-a)(c+a-b...

The expression :
`((a+b+c)(b+c-a)(c+a-b)(a+b-c))/(4b^(2)c^(2))` is :

A

`cos^(2)A`

B

`sin^(2)A`

C

`cos2A`

D

`1-cosA`

Text Solution

Verified by Experts

The correct Answer is:
B
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