A₁A₂ = 2a
∠A₁PA₂ = 180° - 30° - 120° = 30° = ∠PA₁A₂
A₁A₂ = PA₂ = 2a
A₂P倾斜角 = 30° + 30° = 60°
P(u,v)
u = a + 2acos60° = 2a
v = 2asin60° = √3a
代入双曲线方程,a² = b²
e² = c²/a² = (a² + b²)/a² = 2
e = √2
A₁A₂ = 2a
∠A₁PA₂ = 180° - 30° - 120° = 30° = ∠PA₁A₂
A₁A₂ = PA₂ = 2a
A₂P倾斜角 = 30° + 30° = 60°
P(u,v)
u = a + 2acos60° = 2a
v = 2asin60° = √3a
代入双曲线方程,a² = b²
e² = c²/a² = (a² + b²)/a² = 2
e = √2