Решение:
Сторона:
b = √a2 + c2 - 2ac·cos(β°)
= √6002 + 52 - 2·600·5·cos(89°)
= √360000 + 25 - 6000·0.01745
= √359920.3
= 599.93
Высота :
hc = a·sin(β°)
= 600·sin(89°)
= 600·0.9998
= 599.88
Угол:
α° = arcsin(
sin(β°))
= arcsin(
sin(89°))
= arcsin(1·0.9998)
= 88.85°
или:
α° = arccos(
)
= arccos(
599.932+52-6002
2·599.93·5
)
= arccos(
359916.0049+25-360000
5999.3
)
= 90.56°
Угол:
γ° = arcsin(
sin(α°))
= arcsin(
sin(89°))
= arcsin(0.008334·0.9998)
= 0.4774°
Периметр:
P = a + b + c
= 600 + 599.93 + 5
= 1204.9
Площадь:
p =
S =√p·(p-a)·(p-b)·(p-c)
=√602.47·(602.47-600)·(602.47-599.93)·(602.47-5)
=√602.47 · 2.47 · 2.5400000000001 · 597.47
=√2258302.9375965
= 1502.8
Высота :
ha =
=
= 5.009
hb =
=
= 5.01