Oblicz tgα, jeśli : (cosα-sinα)/sinα = 2
źródło:
\frac{cos\alpha-sin\alpha}{sin\alpha}=2
\frac{cos\alpha}{sin\alpha}-\frac{sin\alpha}{sin\alpha}=2
ctg\alpha-1=2
ctg\alpha=3
tg\alpha=\frac{1}{ctag\alpha}=\frac{1}{3}