Precalculus Honors
r = a(1-e2)/(1 + e cos (1-3) equation of ellipse. A = (ab (1-5) area of ellipse. e = (ra - rp)/(ra + rp) eccentricity of ellipse . ra/rp = (1 + e)/(1 - e) ratio of aphelion distance to perihelion distance. ra + rp = 2a relation between aphelion/perihelion distances and major axis. rp = a(1 - e) relations between aphelion/perihelion distances ... ................
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