Values of r and h (don't know they are estimated)

[kinfo]

Hello all
I have a problem, being a part of big task.
Solution exists. But i don't know how it was found.
Can you explain me?
Thx!

Picture and formulas have attached:
h = L1+ L2*sinθ2+D1*cosθ2+(L3+d)*sin(θ2+θ3)+D2*sin(θ2+θ3)
r = L2*cosθ2 - D1*sinθ2+(L3+d)*cos(θ2+θ3)-D2*sin(θ2+θ3)

 

[Deleted member 4993]

Hello all
I have a problem, being a part of big task.
Solution exists. But i don't know how it was found.
Can you explain me?
Thx!

Picture and formulas have attached:
h = L1+ L2*sinθ2+D1*cosθ2+(L3+d)*sin(θ2+θ3)+D2*sin(θ2+θ3)
r = L2*cosθ2 - D1*sinθ2+(L3+d)*cos(θ2+θ3)-D2*sin(θ2+θ3)
View attachment 8945

Drop perpendiculars from the end-point of those sticks - to the x-y plane and z-axis. (edited)
Now look at the drawing again - the method should jump-out at you.

If you still cannot figure it out post the drawing again with those perpendiculars drawn in there. We will continue from there.

 

[kinfo]

Drop perpendiculars from the end-point of those sticks - to the x-axis and z-axis.
Now look at the drawing again - the method should jump-out at you.

If you still cannot figure it out post the drawing again with those perpendiculars drawn in there. We will continue from there.

Sorry, perpendiculars aren't incitements for me, sorry. Let's continue from here ...

 

[Deleted member 4993]

Sorry, perpendiculars aren't incitements for me, sorry. Let's continue from here ...
View attachment 8947

Those perpendiculars will meet the line "r".

Label those points of intersections.

There should be another perpendicular to thr left of the z-axis and down to the x-y plane. Label the point of intersection of that perpendicular with line segment ("r" extended)

 

[kinfo]

Those perpendiculars will meet the line "r".

Label those points of intersections.

There should be another perpendicular to thr left of the z-axis and down to the x-y plane. Label the point of intersection of that perpendicular with line segment ("r" extended)

Sorry for my problems with geometry, i know, that it is a shame
is new pic a right one?

 

[kinfo]

Can we continue?
My conscience doesn't permit me to work without understanding

 

[kinfo]

.

Hello, do we suppress our collaboration?