menu
Qammunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Express the complex number in trigonometric form: -4i I think the answer is 4(cos 180 + i sin 180)
Ask a Question
Questions
Unanswered
Tags
Ask a Question
Express the complex number in trigonometric form: -4i I think the answer is 4(cos 180 + i sin 180)
asked
May 25, 2018
147k
views
4
votes
Express the complex number in trigonometric form: -4i
I think the answer is 4(cos 180 + i sin 180)
Mathematics
high-school
Nic Laforge
asked
by
Nic Laforge
8.0k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
2
Answers
5
votes
Answer:
4(cos 270° + i sin 270°)
Explanation:
Denis Barushev
answered
May 27, 2018
by
Denis Barushev
8.4k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
2
votes
Since the sin term is imaginary and cos is real, you need an angle that makes cos=0 and sin -1. This is 270 degrees. So
-4i=4(cos(270)+isin(270))
SynCap
answered
May 31, 2018
by
SynCap
8.5k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
No related questions found
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Categories
All categories
Mathematics
(3.7m)
History
(955k)
English
(903k)
Biology
(716k)
Chemistry
(440k)
Physics
(405k)
Social Studies
(564k)
Advanced Placement
(27.5k)
SAT
(19.1k)
Geography
(146k)
Health
(283k)
Arts
(107k)
Business
(468k)
Computers & Tech
(195k)
French
(33.9k)
German
(4.9k)
Spanish
(174k)
Medicine
(125k)
Law
(53.4k)
Engineering
(74.2k)
Other Questions
How do you estimate of 4 5/8 X 1/3
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity.org