Question

Se considera triunghiul dreptunchic ABC,m(∡A)=90.°
a)Daca AB=6 cmsiBC=10 cm,calculati AC,sinC,cosC,tgB,ctgB.
b)Daca AB=5cm si AC=5√3cm,calculati BC,sin, cosB,tgC,ctgC.
c) Daca BC=25 cm si sic C=3 pe 5,calculati AB,AC cosB,tg C

Answer 1

A)din th. pitagora AC=√BC²-AB²=√10²-6²=√100-36=√64=8
AC=8
sinC=AB/BC
sinC=6/10=0,6
cosC=AC/BC
cosC=8/10=0,8
tgB=AC/AB
tgB=8/6=1,33
ctgB=AB/AC=6/8=0,75