square root 3/3
universal
00371
its difference
Perpendicular
no you can,t
Sine and the cosine of the angle.
at wild tanget . com at your laptop
The principal solution is 0.7328 radians (42 deg approx).
An external tangent is a line that is tangent to both circles but does not pass between them.
873-984-9bc
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a tangent