I'm trying to animate the tail of an ASCII-fish. I figured out how to do it 
the long way but I'm looking for a short cut.

Concider eleven spheres on a string from the origin to <10,0>. 
1. rotate the whole string 5° around the origin.
2. leave the first sphere in its position. rotate the whole string 5° 
around the current position of the second sphere.
3. leave the first and second sphere in its position. rotate the whole 
string 5° around the current position of the third sphere.
.
.
.
10. rotate the eleventh sphere 5° around the current position of the tenth 
sphere.

Now, is there a direct way to calculate the position of a sphere, without 
going through the above loop. What will the position of sphere 7 be when 
the rotation angle is 5°?

Ingo

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