Find the four fourth roots of 7+27 and express the roots in polar form. [A] 1.64 cis 3.99°, 1.64 cis 93.99°, 1.64 cis 183.99°, 1.64 cis 273.99⁰ [B] 7.28 cis 15.95°, 7.28 cis 105.95°, 7.28 cis 195.95°, 7.28 cis 285.95⁰ [C] 7.28 cis 3.99°, 7.28 cis 93.99°, 7.28 cis 183.99⁰, 7.28 cis 273.99⁰ [D] 1.64 cis 15.95°, 1.64 cis 105.95°, 1.64 cis 195.95°, 1.64 cis 285.95°

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Please solve the following two problems.

6. Find the four fourth roots of 7+2i and express
the roots in polar form.
[A] 1.64 cis 3.99°, 1.64 cis 93.99°, 1.64 cis
183.99°, 1.64 cis 273.99°
[B] 7.28 cis 15.95°, 7.28 cis 105.95°, 7.28
cis 195.95°, 7.28 cis 285.95°
[C] 7.28 cis 3.99°, 7.28 cis 93.99°, 7.28 cis
183.99°, 7.28 cis 273.99°
[D] 1.64 cis 15.95°, 1.64 cis 105.95°, 1.64
cis 195.95°, 1.64 cis 285.95°
7. Two sides of a triangle have sides 10 and 25. The
length of the third side must be greater than
and less than
[A] 10, 25
[B] 14, 36
[C] 15, 35
[D] 9, 26
Transcribed Image Text:6. Find the four fourth roots of 7+2i and express the roots in polar form. [A] 1.64 cis 3.99°, 1.64 cis 93.99°, 1.64 cis 183.99°, 1.64 cis 273.99° [B] 7.28 cis 15.95°, 7.28 cis 105.95°, 7.28 cis 195.95°, 7.28 cis 285.95° [C] 7.28 cis 3.99°, 7.28 cis 93.99°, 7.28 cis 183.99°, 7.28 cis 273.99° [D] 1.64 cis 15.95°, 1.64 cis 105.95°, 1.64 cis 195.95°, 1.64 cis 285.95° 7. Two sides of a triangle have sides 10 and 25. The length of the third side must be greater than and less than [A] 10, 25 [B] 14, 36 [C] 15, 35 [D] 9, 26
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