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Parametrizando la epicicloide - unam

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2<br />

por lo tanto<br />

β =<br />

θ × r0<br />

+θ−π ⇒ P ∈<br />

r<br />

⇒ P ∈<br />

<br />

θ × r0<br />

r cos<br />

<br />

θ × r0<br />

−r cos + θ<br />

r<br />

r<br />

<br />

<br />

θ × r0<br />

+ θ − π , r sen + θ − π<br />

r<br />

<br />

θ × r0<br />

, −r sen + θ<br />

r<br />

Por lo tanto <strong>la</strong>s coordenadas del punto P desde O son:<br />

<br />

<br />

θ × r0<br />

x = (r0 + r) cos(θ) − r cos + θ<br />

r<br />

<br />

<br />

θ × r0<br />

y = (r0 + r) sen(θ) − r sen + θ<br />

r<br />

Ejemplos de curvas<br />

Determine <strong>la</strong> curva intersección del cilindro x 2 +y 2 = 1 y el p<strong>la</strong>no y+z = 2

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