Express the complex number -9i in the form R(cos(0) + i sin(0)) = Rei where R> 0 and 0 ≤ 0 ≤ 2TT. NOTE: Enter the exact answer. - 9i = e² (-1) X
Express the complex number -9i in the form R(cos(0) + i sin(0)) = Rei where R> 0 and 0 ≤ 0 ≤ 2TT. NOTE: Enter the exact answer. - 9i = e² (-1) X
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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Transcribed Image Text:Express the complex number 9i in the form
R(cos(0) + i sin(0)) = Rei where R> 0 and 0 ≤ 0 ≤ 2TT.
<
2π.
NOTE: Enter the exact answer.
-9i
=
e² (-1)
×
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