Concept explainers
(a)
To create a table of and
values using
(a)

Explanation of Solution
Given Information:
The given parametric equations are-
Consider the parametric equations given by
(1)
The parametric equations are defined for all values ofso the domain for
is
Since the exponential function is always positive, both
and
take on positive values only. So take few values of the parameter
and find corresponding values of
and
Tabulate these results for better appreciation and mark each of the points
in the
coordinate plane. Join these points to get the sketch of the given parametric equations. Mark the orientation of the curve as
takes on values from negative to positive. The table given below is helpful in plotting the points.
Sketch of the parametric equations is given below. The graph is extending toalong both
and
axis. Since for large values of, the exponential function with negative exponent is close to 0, one arm of the graph extends to. And for large value of, the exponential function with positive exponent tends to infinity; the other arm of the graph extends to
along
axis. The orientation of the graph is from downwards to upwards for all values of
To find out the rectangular equation by eliminating the parameterfrom the two given equations.

Explanation of Solution
Given Information:
The given parametric equations are-
Calculation:
From the first of the parametric equationsin terms of
is given by
Substitute this value ofin terms of
in the second parametric equation to get
Therefore, the equation in rectangular coordinates for the given parametric equations is-
Chapter 10 Solutions
EBK PRECALCULUS W/LIMITS
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