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the value of sin(pi/7)+sin((2pi)/7)+sin(...

the value of `sin(pi/7)+sin((2pi)/7)+sin((3pi)/7)` is

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Knowledge Check

  • The value of : sin""(pi/7).sin""((3pi)/14).sin""((5pi)/14).sin""((7pi)/14) is :

    A
    1
    B
    `1/4`
    C
    `1/8`
    D
    `sqrt(2)/7.`

  • The value of sin""(2pi)/(7)+sin""(4pi)/(7)+sin""(8pi)/(7), is

    A
    `sqrt7//8`
    B
    `1//8`
    C
    `sqrt7//2`
    D
    `-sqrt7//2`

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