1.

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

Answer»

A `3/2`
B`5/2`
C3
D`7/2`

ANSWER :C


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