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Prove that: s inpi/(10)+s in(13pi)/(10)=...

Prove that: `s inpi/(10)+s in(13pi)/(10)=-1/2`

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Knowledge Check

  • sinpi/10+sin(13pi)/(10)=?

    A
    1
    B
    `1/2`
    C
    `-1/2`
    D
    None of these

  • Prove that: sin((pi)/(10))sin((13 pi)/(10))=-(1)/(4)

    A

    `-1/4 `
    B

    `1/4 `
    C

    `-1/2 `
    D
    None of these

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