Răspuns :
[tex]tg^{2} 45[/tex] + [tex]tg^{2}60[/tex] = [tex](tg45+tg60)^{2}[/tex] - 2tg45tg60 = [tex](1+√3)^{2}[/tex] - 2×1×√3 = 1+2√3+3-2√3 = 4
[tex]tg^{2} 45[/tex] + [tex]tg^{2}60[/tex] = [tex](tg45+tg60)^{2}[/tex] - 2tg45tg60 = [tex](1+√3)^{2}[/tex] - 2×1×√3 = 1+2√3+3-2√3 = 4