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CELEBRITY BIRTHDAYS — Apr 09

Calculate distance in 3D space

Imagine I want to determine the distance between points 0,0,0 and 1,2,3. How is this calculated?...

REGIONAL UPDATES — Apr 09

Difference in logic notations for maths and computer science

I am reading: How to prove it, A structured approach by Daniel J.Velleman and despite it being a boo...

CELEBRITY BODYGUARDS — Apr 09

derivative with respect to constant.

I have been beating my head against this question for quite some time, I do not know whether it has ...

ENERGY NEWS — Apr 09

Probability of Posting a Quad and Trip on 4chan

Important Pre-Requisite Knowledge On the image board 4chan, every time you post your post gets a 9 ...

REGIONAL UPDATES — Apr 09

Eigenvectors in Matlab/Octave, function "eig()", why are the eigenvectors output like that? [closed]

You can calculate eigenvectors of a matrix with eig() function like this: [eigenvectors, eigenvalue...

FINANCIAL NEWS — Apr 09

Calculation of Radon–Nikodym derivative

Suppose the function $X \colon \mathbb{R} \longrightarrow \mathbb{R} \colon x \longmapsto X(x) : = x...

FINANCIAL NEWS — Apr 09

What is an anti chain

Which of the following is the correct definition of an anti chain .. 1). A subset S of a partially ...

CELEBRITY BODYGUARDS — Apr 09

SageMath: defining class of functions on Elliptic Curves

In SageMath, I would like to manipulate rational functions on elliptic curves (defined on finite fie...

$Prove this formula $1+\cos\theta+\cos2\theta+...+\cos n\theta=\frac{1}{2}+\frac{\sin(n+\frac{1}{2})\theta}{2\sin\frac{\theta}{2}}$ [duplicate]$

BUSINESS NEWS — Apr 09

Prove this formula $1+\cos\theta+\cos2\theta+...+\cos n\theta=\frac{1}{2}+\frac{\sin(n+\frac{1}{2})\theta}{2\sin\frac{\theta}{2}}$ [duplicate]

This is homework but I’m really stuck. The question is to prove a fromula which states: $$1+\cos\t...

CLIMATE REPORTS — Apr 09

Function transformation: shrink horizontally

Write the formula for $f(x)$, if the graph of $f$ can be obtained from the graph of $y = g(x)$ by sh...

CLIMATE REPORTS — Apr 09

Goldschmidt division example with estimates?

I have found in Gonzalez/Diaz-Herrera/Tucker: Computing Handbook an example for the Goldschmidt divi...

REGIONAL UPDATES — Apr 09

Meaning of the spectral norm of a matrix

Is there an intuitive meaning for the spectral norm of a matrix? Why would an algorithm calculate th...

CELEBRITIES ON SOCIAL MEDIA — Apr 09

multiplication in H-space and loopspace of the H-space

Let $X$ be an $H-space$, and let a multiplication $,\cdot,$ be given, associative up to homotopy. L...

TIKTOK TRENDS — Apr 09

Derivation of the energy equation in fluid dynamics

I'm working through Acheson's 'Elementary Fluid Dynamics' and i'm having tr...

CULTURE — Apr 09

Are there more even numbers than odd numbers?

Very simple 'yes-or-no' question, but I can't find the answer anywhere. My gut feelin...

CELEBRITY FASHION LINES — Apr 09

What's 110 degrees counterclockwise from positive direction of x-axis?

What are the x and y components of a vector a with arrow in the xy plane if its direction is 110° c...

ENERGY NEWS — Apr 09

Can covariance be negative?

So I always thought that covariance could take any real number. However, in class today my professor...

$Calculate remainder of $12^{34^{56^{78}}}$ when divided by $90$$

WEATHER NEWS — Apr 09

Calculate remainder of $12^{34^{56^{78}}}$ when divided by $90$

Calculate remainder of $12^{34^{56^{78}}}$ when divided by $90$ First of all,I'm not sure abou...

WEATHER NEWS — Apr 09

How to derive the Riemann Curvature Tensor?

I'm taking a course in General Relativity, and before getting into Physics itself, the required...

CELEBRITY BODYGUARDS — Apr 09

Rate of Change of Volume in a Sphere

Assume that the radius $r$ of a sphere is expanding at a rate of $7$ in. /min. The volume of a spher...

$Inverse laplace transform of $\frac{1}{s^3(s-1)}$$

FASHION NEWS — Apr 09

Inverse laplace transform of $\frac{1}{s^3(s-1)}$

I have a problem with this transform. I know that using this theorem (see the theroem) I can get the...

CLIMATE REPORTS — Apr 09

Center of mass and moment of inertia of a $2$-dimensional donut?

I have a an assignment and I'm stuck on this question: First of all I can't figure out th...

$How do you get $\alpha$ from $\tan{\alpha}$?$

CLIMATE REPORTS — Apr 09

Calculate distance in 3D space

Difference in logic notations for maths and computer science

derivative with respect to constant.

Probability of Posting a Quad and Trip on 4chan

Eigenvectors in Matlab/Octave, function "eig()", why are the eigenvectors output like that? [closed]

Calculation of Radon–Nikodym derivative

What is an anti chain

SageMath: defining class of functions on Elliptic Curves

Prove this formula $1+\cos\theta+\cos2\theta+...+\cos n\theta=\frac{1}{2}+\frac{\sin(n+\frac{1}{2})\theta}{2\sin\frac{\theta}{2}}$ [duplicate]

Function transformation: shrink horizontally

Goldschmidt division example with estimates?

Meaning of the spectral norm of a matrix

multiplication in H-space and loopspace of the H-space

Derivation of the energy equation in fluid dynamics

Are there more even numbers than odd numbers?

What's 110 degrees counterclockwise from positive direction of x-axis?

Can covariance be negative?

Calculate remainder of $12^{34^{56^{78}}}$ when divided by $90$

How to derive the Riemann Curvature Tensor?

Rate of Change of Volume in a Sphere

Inverse laplace transform of $\frac{1}{s^3(s-1)}$

Center of mass and moment of inertia of a $2$-dimensional donut?

How do you get $\alpha$ from $\tan{\alpha}$?

How do you find the radius with only the slant height? Please show work.

Find a normal vector onto the line

Sigma notation formula $i=0$ [closed]

Find sample size given standard deviation, sample mean, confidence interval

sum of all the numbers that can be formed using the digits 2,3,3,4,4,4..

Drawing Plausible Phase Portrait

What is the meaning of the symbol "$\left|\underline{\;n\;}\right.$" for integer $n$?

How can one "cancel out" set union as if I am using the additive property of equality of real numbers?

How many ways $12$ persons may be divided into three groups of $4$ persons each?

How to represent a logic equivalence?

Find the number of bicycles and tricycles [duplicate]

Motivation behind study of martingales