\vec{p}_U

\vec b_1=\vec v_1=\vec v

\vec v_2=\vec w

\vec v_3=\vec p

\vec b_3=\vec n

\vec w_v

U=\ 
span(\vec v,\vec w)

\vec b_2=\vec w-\vec w_v

V: (5, -2, -1)
v = Vector(V)
W: (5, 6, -1)
w = Vector(W)
O: (0, 0, 0)
vw: (v * w)
vv: (v * v)
p_1 = Plane(O, V, W)
a: v ⊗ w
P: (6, 0, 4)
n = Vector((1, 0, 5))
P_U: (5, 0, -1)
c = Vector(O, P_U)
W_{v}: (7 / 15 * (5, -2, -1))
w_v = Vector(O, W_{v})
ww: (w * w)
β = Angle(P, P_U, O)
p = Vector(O, P)
B: (vw / vv * V)
k = Segment(B, W)
b = Vector(B, W)
γ = Angle(W, W_{v}, O)
u = Vector((5, 0, -1), P)
d: (15 / 8 * b)
e: (8 / 15 * d)
A = (-5.697568820348505, 4.2445662895534895)
C = (-4.675707477249803, 4.2445662895534895)