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Jan
26
awarded  Yearling
Jan
23
revised Determing the following subsets of $\mathbb{R}^{2}$ when open, closed, bounded
added 24 characters in body
Jan
23
revised Determing the following subsets of $\mathbb{R}^{2}$ when open, closed, bounded
added 24 characters in body
Jan
23
reviewed Reject Determing the following subsets of $\mathbb{R}^{2}$ when open, closed, bounded
Jan
23
revised Determing the following subsets of $\mathbb{R}^{2}$ when open, closed, bounded
added 24 characters in body
Jan
17
comment Lost proof of trigonometric formula
It doesn't seem to be true.
Jan
17
revised Let $a,b,c$ be three roots of equation $e^{2x}\sin(2x) - 7 = 0$. Then root of equation $e^{2x}\sin(2x) + 7 = 0$
added 19 characters in body; edited title
Jan
17
comment Finding Laurent's series of a function
You should not exclude $z=0$ in case I.
Jan
17
answered Finding Laurent's series of a function
Jan
10
revised Proving limit of sequence equals $0$
edited title
Jan
10
revised How do I find $r(x,x_0)$ of function?
edited title
Jan
10
comment Verify Stokes theorem for $F=(x^2-y^2){\bf i}+2xy{\bf j}$ in a rectangular region
Do you know what the Stokes theorem says?
Jan
10
comment Verify Stokes theorem for $F=(x^2-y^2){\bf i}+2xy{\bf j}$ in a rectangular region
What you have tried?
Jan
9
revised A test to ascertain that both equation lies on the same line
deleted 5 characters in body
Jan
8
answered $\lim _{x\to 0}\left(\frac{\sqrt[2]{\cos \left(x\right)}-\sqrt[3]{\cos \left(x\right)}}{\sin ^2\left(x\right)}\right)$ without L'Hospitals rule?
Jan
8
comment Calculating Laplace inverse
You know partial fractions?
Jan
8
revised Calculating Laplace inverse
added 2 characters in body
Jan
8
revised Prove that a straight line is the shortest distance between two points?
added 3 characters in body
Jan
8
comment Prove that a straight line is the shortest distance between two points?
@Cielo: to visualize, imagine $t\in[a,b]$ is the time, so $p=\alpha(a)$ is the position at the initial time $a$, it is a point in space $\mathbb{E}_3$, while $q=\alpha(b)$ is the position at the final time $b$.
Jan
8
comment Differentiation of Angular Velocities
What is $n$? Where this formulas come from, it not resembles the usual relation between angular velocity and derivatives of Euler angles.