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  • cos(d + 45°)
    (√2/2) (cosd - sind)
  • tg(45° + d)
    (1 + tgd) / (1 - tgd)
  • tg(60° - d)
    (√3 - tgd) / (1 + √3 tgd)
  • sin(60° - d)
    (√3/2) cosd - (1/2) sind
  • sin(30° + d)
    (1/2) cosd + (√3/2) sind
  • cos(d - 60°)
    (1/2) cosd + (√3/2) sind
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