Casio FX-CG20 Manual

A SERVICE OF

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CASIO

5-60

u To calculate the focus and length of latus rectum

Example To determine the focus and length of latus rectum for the parabola X =

(Y – 2)

2

+ 3

Use the following V-Window settings.

Xmin = –1, Xmax = 10, Xscale = 1

Ymin = –5, Ymax = 5, Yscale = 1

m Conic Graphs

w

bwcwdw6(DRAW)

!5(G-SOLVE)

1(FOCUS)

(Calculates the focus.)

!5(G-SOLVE)

5(LENGTH)

(Calculates the length of latus rectum.)

• When calculating two foci for an ellipse or hyperbolic graph, press e to calculate the

second focus. Pressing d returns to the first focus.

• When calculating two vertexes for a hyperbolic graph, press e to calculate the second

vertex. Pressing d returns to the first vertex.

• Pressing e when calculating the vertices of an ellipse will calculate the next value.

Pressing d will scroll back through previous values. An ellipse has four vertices.