3D Line Equations and Skew
Line Intersection and Triangle Angles
If the line x = y = z intersects the line x sin A + y sin B + z sin C - 18 = 0 = x sin 2A + y sin 2B + z sin 2C - 9, where A, B, C are the angles of a triangle ABC, then
80
(
sin
A2
sin
B2
sin
C2
)
is equal to............