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y2o2

  • 4 years ago

Prove that (cos pi/7)(cos 2pi/7)(cos 4pi/7)=(-1/8)

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  1. Physicist.ALI
    • 4 years ago
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    I can prove it via a rectangular-shaped machine called calculator.

  2. y2o2
    • 4 years ago
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    @Physicist.ALI Lol

  3. Physicist.ALI
    • 4 years ago
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    I do deserve a medal dude ^_^

  4. y2o2
    • 4 years ago
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    I deserve a "Thank you"

  5. Physicist.ALI
    • 4 years ago
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    hahahahaha thanx there

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