The value of sin^2 (pi/8)+sin^2 ((3pi)/8...

The value of `sin^2 (pi/8)+sin^2 ((3pi)/8)+sin^2 ((5pi)/8)+sin^2 ((7pi)/8)` is

A

1

B

2

C

`3/8`

D

`1/8`

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Select the correct option from the given alternatives. The value of sin (pi/14) sin ((3pi)/14) sin ((5pi)/(14)) sin ((7pi)/(14)) sin ((9pi)/(14)) sin ((11pi)/14) sin ((13pi)/14) is

A

`1/(16)`

B

`1/(64)`

C

`1/(28)`

D

`1/(256)`

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sin(pi/10)sin((3pi)/10)=