## Y Crssrk i a rssinpil rscospirk

Let us consider the intersection of y with x:

Let us eliminate three of the four parameters; for instance resolving for k, there can be obtained:

and the equation of the intersecting curve in the reference (O,ij, i2, i3):

If the reference system is changed (C, ij, i2, i3) and rotated in (C, s, v, i3):

Figure 8. The estimated ellipse. In blue the surveyed points, in red the geometrical ones.

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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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