Pole koła: P = πr2; Obwód koła: O = 2πr
Sinus sumy kątów o wymiarach ⲁ i β: sin(ⲁ + β) = sinⲁcosβ + cosⲁsinβ
Prędkość średnia w ruchu prostoliniowym: V = Δs/Δt; gdzie Δs = s- s1; Δt = t- t1
Jednostka oporu elektrycznego: 1Ω = 1V/1A; 1MΩ = 106Ω; 1kΩ = 103Ω; 1mΩ = 10-3Ω
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