How to plot a point in 3-D and Rotation of the point ?

[lvl107]

Hello Everyone.
From :

       

To : 1. How to plot a point in 3-D and :

       2. Rotation of that point a angle t (say, = Pi/2) about X-axis ?
Thanks in advance for your time and help.
Regards.

[lvl107]

[ttokoro]

n=40, The resistance of  tetrahedron of 1 ohm elements is 1.31714 ohm.

[ttokoro]

R n=2*2 is 3/2 ohm.

R n=10000*10000 is 11.8044 ohm.

[ttokoro]

R3D 1*1*1 is 5/6 ohm.

R3D 2*2*2 is 43/42 ohm.

R3D 1000^3 is 1.438859 ohm.

R3D 20*20*20 is above.

[ttokoro]

[lvl107]

Regards.

[lvl107]

Regards.

[ttokoro]

[lvl107]

Regards.

[ttokoro]

[lvl107]

[lvl107]

[ttokoro]

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[ttokoro]

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[lvl107]