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A
Aion
reacted to
fresh_42's post
in the thread
Complex numbers
with
Like
.
de Moivre says (\cos(x) +i \sin(x))^n =\cos(nx) + i \sin(nx) and we are interested in \cos(5x). Hence, \begin{array}{lll}...
19 minutes ago
F
fresh_42
replied to the thread
Complex numbers
.
de Moivre says (\cos(x) +i \sin(x))^n =\cos(nx) + i \sin(nx) and we are interested in \cos(5x). Hence, \begin{array}{lll}...
24 minutes ago
A
Aion
replied to the thread
Complex numbers
.
If you compare your result with the required one it is apparent you made a mistake at the start of the derivation. I recommend using the...
32 minutes ago
M
mario99
replied to the thread
Superposition Principle Undetermined Coefficients
.
It is telling you that because the auxiliary equation has r = i or r = -i, the guess for the particular solution will be y_p(t) = t(At +...
51 minutes ago
H
HATLEY1997
posted the thread
Complex numbers
in
Intermediate/Advanced Algebra
.
I have got this down to the real numbers (I think). But struggling with what to do at the end here to get the required trig identity...
Today at 11:44 AM
Integrate
posted the thread
Superposition Principle Undetermined Coefficients
in
Calculus
.
If I understand the superposition principle of undetermined coefficients then that means we can take each part on the right hand side...
Today at 11:05 AM
Integrate
replied to the thread
What determines how we group in method of undetermined coefficients?
.
I was wondering why they grouped the way they did. Which after working it through their way I see it is much easier to group with the...
Today at 10:51 AM
Integrate
replied to the thread
What determines how we group in method of undetermined coefficients?
.
This very much helps me understand what a linear combination is for sure. Something that I did not understand fully. Though I am...
Today at 10:49 AM
Integrate
reacted to
Steven G's post
in the thread
What determines how we group in method of undetermined coefficients?
with
Like
.
If you have a set of functions which you multiply each function by a scalar and then add these together you have a linear combination of...
Today at 10:48 AM
Dr.Peterson
replied to the thread
How to start this question?
.
Check the details; I don't think everything is exactly right, but I don't have time to examine it in detail. (I'm preparing for a trip...
Today at 9:29 AM
K
Kulla_9289
replied to the thread
How to start this question?
.
OX = (3p/2) + q FY = 2p + 2q + zBD BD = 2q So, (3p/2) + q = a(2p + 2q + z(2q))
Today at 8:42 AM
Dr.Peterson
replied to the thread
How to start this question?
.
Keep going. Express OX in terms of p and q. And then express FY in terms of p and q and another scalar, using the fact that Y is on BD...
Today at 8:09 AM
K
Kulla_9289
replied to the thread
How to start this question?
.
OX = aFY
Today at 3:46 AM
Dr.Peterson
replied to the thread
How to start this question?
.
Yes (and collinear is essentially the same thing, since vectors have no specific location). So write a vector equation expressing the...
Yesterday at 1:05 PM
K
Kulla_9289
replied to the thread
How to start this question?
.
then what's collinear? whats the difference?
Yesterday at 12:07 PM
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