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Dec
10
comment Why can $1 + \cos(t+y) + \cos(t+y)(\frac{dy}{dt}) = 0$ be written in the form $(\frac{d}{dt})\lbrack t + \sin(t+y) \rbrack = 0$?
It follows from the Chain rule
Dec
10
reviewed Approve I need help with a partial derivative
Dec
10
reviewed Approve Probability: 6 Dice are rolled. Which is more likely, that you get exactly one 6, or that you get 6 different numbers?
Dec
9
reviewed Approve Prove $g(x)= x^2 \sin \left(\frac1x\right)$ is not uniformly continuous
Dec
9
revised Show that this two variable limit don't exist
added 4 characters in body
Dec
9
comment Show that this two variable limit don't exist
$$\lim\limits_{x\to{1}}\frac{\sin{\left(2(1-x)\right)}}{1-x}=2\lim\limits_{x\to{‌​1}}\frac{\sin{\left(2(1-x)\right)}}{2(1-x)}=2.$$
Dec
8
revised Show that this two variable limit don't exist
added 371 characters in body
Dec
8
comment Show that this two variable limit don't exist
I edited my answer.
Dec
8
revised Show that this two variable limit don't exist
added 716 characters in body
Dec
8
answered Show that this two variable limit don't exist
Dec
8
awarded  Caucus
Dec
6
reviewed Approve Find closed form for $2 \times (n + (n + 1) + \cdots + (2n - 1))$
Dec
3
reviewed Approve Fourier Transform of Sine
Dec
3
reviewed Approve hamming window eqation formula problem
Nov
30
reviewed Approve English sentences to first order logic
Nov
29
reviewed Reject What does continuity *in general* mean?
Nov
25
reviewed Approve Help with inverse Laplace transform
Nov
23
comment Prove series converge using comparison test
Discarding a finite number of terms does not change the convergence.
Nov
23
reviewed Approve Prove that this inequality $5(a^2+b^2+c^2) \leq 6(a^3+b^3+c^3)+1$
Nov
23
reviewed Approve What does “two polynomials have no zeros in common” mean?