AB=3цел1/3
СВ=5√3/3
S=25√3/6
Объяснение:
sin<B=AC/AB
sin60°=√3/2
√3/2=5/AB
AB=5*2/3=10/3=3цел1/3
tg<B=AC/CB
tg60°=√3
√3=5/CB
CB=5/√3=5√3/3
S=1/2*CB*AC=1/2*5*5√3/3=25√3/6
AB=3цел1/3
СВ=5√3/3
S=25√3/6
Объяснение:
sin<B=AC/AB
sin60°=√3/2
√3/2=5/AB
AB=5*2/3=10/3=3цел1/3
tg<B=AC/CB
tg60°=√3
√3=5/CB
CB=5/√3=5√3/3
S=1/2*CB*AC=1/2*5*5√3/3=25√3/6