Объяснение:
1) x/sin(180-(α+β)) = a/sin(α) => x = (a*sin(α+β))/(sin(α))
2) x = arccos( (a^2-b^2-c^2)/(-2*b*c) )
Объяснение:
1) x/sin(180-(α+β)) = a/sin(α) => x = (a*sin(α+β))/(sin(α))
2) x = arccos( (a^2-b^2-c^2)/(-2*b*c) )