(a)
To find:the whether the reflector in the telescope is elliptical, parabolic or hyperbolic.
(a)
Answer to Problem 47E
This conic is an ellipse.
Explanation of Solution
Given:
Concept used:
The general equation for
Where
As by changing the values of some of the constants, the shape of the corresponding conic also changes.
If
If
If
Calculation:
Consider the equation as:
To determine the minimum angle of rotation needed to transform the graph of this equation to a graph whose axes are on the
Write the above equation in the standard conic form:
The angle od rotation is given by
So, the angle of rotation
Hence, the angle of rotation
(b)
To sketch:the graph of the equation using the graphing calculator.
(b)
Answer to Problem 47E
The graph is ellipse.
Explanation of Solution
Given:
Concept used:
The general equation for conic section is:
Where
As by changing the values of some of the constants, the shape of the corresponding conic also changes.
If
If
If
Calculation:
Use the angle
Find the new equation of the graph.
To find the expressions, replace
Replace
And
(c)
To find:the angle through which the mirror has been rotated.
(c)
Answer to Problem 47E
The angle of rotation
Explanation of Solution
Given:
Concept used:
The general equation for conic section is:
Where
Where
Calculation:
Substitute the value of
It can be further solved as:
Grouping the like term as:
Hence, therefore the new equation of the graph is
Chapter 10 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
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