Kąt jest ostry oraz . Wtedy
tgα=13\displaystyle \tg\alpha= \frac{1}{3} tgα=31\displaystyle \tg\alpha= \frac{1}{3}
tgα=3\tg\alpha=3tgα=3\tg\alpha=3
tgα=3\tg\alpha=\sqrt{3}tgα=3\tg\alpha=\sqrt{3}
tgα=33\displaystyle \tg\alpha= \frac{\sqrt{3}}{3} tgα=33\displaystyle \tg\alpha= \frac{\sqrt{3}}{3}
d9ce7e33-714e-4a44-9515-dcae0f0011e2
(stara formuła)
