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Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742

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BuyFindarrow_forward

Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742
Textbook Problem

25—38. Polar Equation for a Hyperbola A polar equation of aconic is given. (a) Show that the conic is a hyperbola, and sketchits graph. (b) Find the vertices and directrix, and indicate them on the graph. (c) Find the center of the hyperbola, and sketch the asymptotes.

r = 6 2 + 7 cos θ

To determine

(a)

To show:

The given polar equation is a hyperbola. Also draw the graph of it.

Explanation

Given:

The given polar equation is r=62+7cosθ.

Concept:

The general equation of conic in polar form with one focus at origin and eccentricity e is given by as below.

r=ed1±ecosθ or r=ed1±esinθ

The conditions for different conic section for above formula follows as below.

a) It is a parabola if e=1.

b) It is an ellipse if 0<e<1.

c) It is hyperbola e>1.

Calculation:

Consider the given equation,

r=62+7cosθ

Divide the numerator and denominator by 2.

To determine

(b)

To find:

The vertices and directrix of hyperbola and show them on the graph.

To determine

(b)

To find:

The center and asymptotes of hyperbola and show it on the graph.

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