Answer
$r = \frac{4}{cos~\theta-sin~\theta}$
We can see the graph below:
Work Step by Step
$x-y = 4$
$r~cos~\theta-r~sin~\theta = 4$
$r = \frac{4}{cos~\theta-sin~\theta}$
We can see the graph below:
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.5 Polar Equations and Graphs - 8.5 Exercises - Page 394: 37
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