Chapter 10.6, Problem 33E

### Calculus (MindTap Course List)

11th Edition
Ron Larson + 1 other
ISBN: 9781337275347

Chapter
Section

### Calculus (MindTap Course List)

11th Edition
Ron Larson + 1 other
ISBN: 9781337275347
Textbook Problem

# Finding a Polar Equation In Exercises 33-38, Find a polar equation for the conic with its focus at the pole and the given eccentricity and directrix. (For convenience, the equation for the directrix is given in rectangular form)Conic Eccentricity DirectrixParabola e = 1 x = − 3

To determine

To calculate: The polar equation for the parabola having its focus at the pole and the eccentricity e=1 and the equation of directrix is x=3.

Explanation

Given:

The conic is parabola having:

The eccentricity: e=1

And the equation of directrix is: x=âˆ’3

Formula used:

The polar form of the equation for the parabola having its focus at the pole is:

r=ed1âˆ’ecosÎ¸

Here, e is the eccentricity of the parabola and d is the distance from the focus and its directrix.

The standard equation of directrix is: x=âˆ’d

Calculation:

The equation for directrix is: x=âˆ’3

So,

x=âˆ’d

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