Răspuns :
Explicație pas cu pas:
[tex] \sin(C) = \frac{AB}{BC} = \frac{9}{BC} [/tex]
[tex] \tan(B) = \frac{AC}{AB} = \frac{AC}{9} [/tex]
Răspuns:
BC²-AB²=AC²AC²-15²-9²
AC²=225-81
AC²=144
AC=√144
AC=12cm
sinB=co/ip⇒sinB=AC/
BC⇒sinB=12/5⇒sinB-4/5
cosB=ca/ip⇒cosB=AB/
BC⇒cosB=9/15⇒cosB=3/5
tgC=co/ca⇒tgC=AB/
AC⇒tgC=9/12⇒tgC=3/4
ctgC=ca/co⇒ctgC=AC/
AB⇒ctgC=12/9⇒ctgC=4/3