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sin^4(pi/8)+sin^4((2pi)/8)+sin^4((3pi)/8...

`sin^4(pi/8)+sin^4((2pi)/8)+sin^4((3pi)/8)+sin^4((4pi)/8)+sin^4((5pi)/8)+sin^4((6pi)/8)+sin^4((7pi)/8)=`

A

1) `3/2`

B

2) `5/2`

C

3) 3

D

4) `7/2`

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