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7-8sin-pi-7-sin-2pi-7-sin-3pi-7-




Question Number 166693 by cortano1 last updated on 25/Feb/22
      ((√7)/(8sin (π/7)sin ((2π)/7)sin ((3π)/7))) =?
$$\:\:\:\:\:\:\frac{\sqrt{\mathrm{7}}}{\mathrm{8sin}\:\frac{\pi}{\mathrm{7}}\mathrm{sin}\:\frac{\mathrm{2}\pi}{\mathrm{7}}\mathrm{sin}\:\frac{\mathrm{3}\pi}{\mathrm{7}}}\:=? \\ $$

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