半角公式
2025-10-06
半倍角公式:tan(α/2)=(1cosα)/sinα=sinα/(1+cosα);cot(α/2)=sinα/(1cosα)=(1+cosα)/sinα;sin^2(α/2)=(1cos(α))/2;cos^2(α/2)=(1+cos(α))/2;tan(α/2)=(1cos(α))/sin(α)=sin(α)/(1+cos(α))...
2025-10-06
半倍角公式:tan(α/2)=(1cosα)/sinα=sinα/(1+cosα);cot(α/2)=sinα/(1cosα)=(1+cosα)/sinα;sin^2(α/2)=(1cos(α))/2;cos^2(α/2)=(1+cos(α))/2;tan(α/2)=(1cos(α))/sin(α)=sin(α)/(1+cos(α))...