
To calculate: To find the indicated roots and graph the roots in the complex plane

Answer to Problem 83E
The forth roots are
Explanation of Solution
Given information: The forth roots of
Formula Used:
If
Calculation:
Complex number is given as
Polar form of complex number is
Calculating the value of
Calculating the value of
Hence, complex number in polar form is
In order to find fourth roots of above complex number, apply nth Rule of Complex numbers
Here,
Thus,
Now, the value of
Thus,
Hence,
When
When
When
When
Now, plotting the above points on the complex plane. All points lie on a circle of radius
Conclusion:
Hence, forth roots are
Chapter 8 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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