aplicam functiile trigonometrice in triunghiurile dreptunghice formate cu inaltimea
a)
ctg(<b)=BD/AD ctg30=√3 BD/AD=√3 BD/8√3=√3 BD=3X8=24
ctg(<C)=DC/AD ctg45=1 DC/AD=1 DC/8√3=1 DC=8√3
BC=BD+DC=24+8√3=8(3+√3)
la fel cu celelalte unghiuri
b)
ctg45=1 ctg60=1/√3 BD/AD=1 DC/AD=1/√3
BD=8√3 DC=8 BC=8(√3+1)