Ile wynosi wyrażenie (tg alfa+ctg alfa)do kwadratu gdy tg alfa=1/3

[latex]tgalpha=frac{1}{3}\ctgalpha=frac{1}{tgalpha}=frac{1}{frac{1}{3}}=3[/latex] [latex](tgalpha+ctgalpha)^2=(frac{1}{3}+3)^2=(frac{10}{3})^2=frac{100}{9}=11frac{1}{9}[/latex]