Express the given complex number (-3) in the polar form.​

Answers

Answer 1

Answer:

Given, complex number is -3.

Let r cos θ = -3 …(1)

and r sin θ = 0 …(2)

Squaring and adding (1) and (2), we get

r^2cos^2θ + r^2sin2θ = (-3)^2

Take r2 outside from L.H.S, we get

r^2(cos^2θ + sin^2θ) = 9

We know that, cos^2θ + sin^2θ = 1, then the above equation becomes,

r^2 = 9

r = 3 (Conventionally, r > 0)

Now, subsbtitute the value of r in (1) and (2)

3 cos θ = -3 and 3 sin θ = 0

cos θ = -1 and sin θ = 0

Therefore, θ = π

Hence, the polar representation is,

-3 = r cos θ + i r sin θ

3 cos π + 3 sin π = 3(cos π + i sin π)

Thus, the required polar form is 3 cos π+ 3i sin π = 3(cos π+i sin π)

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Related Questions

please help i don’t know any german. Select the correct answer.
Which pair of auxiliary and main verb correctly completes this conversation?
Johann: Was hast du letzte Woche gemacht?
Anna: Ich ____ and den Strand _____ (gehen).
A.
war ... gehen
В.
habe ... gegangen
C.
bin ... gegangen
D.
hat ... gehen

Answers

it is C. bin gegangen;)

please help me. Select the correct answer.
Which subject pronoun best completes this sentence?
____ esst Pizza,
A.
Er
B.
Du
C.
Ich
D.
Ihr

Answers

A best completes the sentence
The correct one is „Ihr“ -D-

Aufgabe 2:
Trage das passende Adjektiv aus Aufgabe 1 in die Lücken ein.
a) Jemand, der offen und freundlich ist, ist
b) Jemand, der klug ist und bestimmte Begabungen hat, ist
c) Jemand, der nicht lügt, sondern die Wahrheit sagt, ist
d) Jemand, der nicht feige ist und keine Angst hat, ist
e) Jemand der anderen gegenüber gerecht ist, ist
f) Jemand, der viele gute Ideen hat und gern etwas gestaltet, ist
g) Jemand, der mit seiner Persönlichkeit zufrieden ist, ist
h) Wer immer zu seinem Wort steht, ist
i) Jemand, der viel und sorgfältig lernt oder arbeitet, ist
j) Wer nicht chaotisch ist und gern sein Zimmer aufräumt, ist​

Answers

Answer:

ein. abgehend

b. intelligent

c. ehrlich

d. mutig

e. unparteiisch

f. kreativ

G. bescheiden

h. ehrlich

ich. fleißig

j. reinigen

Explanation:

Acktiv with passive most children like to eat sweet ​

Answers

are the sweets being eaten by children now ?
Süßigkeiten werden von vielen Kindern gegessen
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