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Jun
7
comment How to explain the perpendicularity of two lines to a High School student?
I think you should read the question a little more. A high school student doesn't need real life examples to understand what "perpendicular" is.
May
10
answered ∇×F (Curl) of a function of 4 variables?
Apr
27
comment Have you encountered this integral?
I think you mean $P$ is the transform of $f$.
Apr
24
accepted Taylor expansion of a not easily differentiable function
Apr
23
answered Let $\int_a^bf(x)sgn(f(x)) + 2f(x) \ dx = 0$. Show that $f$ has at least one root.
Apr
23
comment Taylor expansion of a not easily differentiable function
@Fred: Taylor series around where? The function doesn't work for $ x\le 1$, that's the problem.
Apr
20
asked Taylor expansion of a not easily differentiable function
Apr
13
comment Difficult Improper Integral
What's so terrible about $\frac{114}{19}$?
Apr
6
revised How do I solve this indeterminate limit without the L'hospital rule?
latex
Mar
30
awarded  Quorum
Mar
29
reviewed Approve About $ \lim_{x\rightarrow 0}\frac {\sin x}{x} = 1$
Mar
13
reviewed Approve $SO(n)$ is connected
Mar
12
reviewed Approve Should an undergrad accept that some things don't make sense, or study the foundation of mathematics to resolve this?
Mar
6
reviewed Approve Solve the differential equation: $(y^2-xy)dx+x^2dy=0$
Feb
28
revised Integrating $f(y) = e^{-y} y^3$
wrong variable name
Feb
28
reviewed Approve If $x=1\mod3$ and $x=0\mod2$, what is it $\mod6$?
Feb
24
reviewed Approve Indefinite Integral $\int \sin (x) \ln (\tan (x))dx$
Feb
24
answered Solving $\int\sqrt{1+(-2ax+b)^2}\;dx$
Feb
20
answered $\lim_{(x,y) \to(0,0)}\sin(x - y)$
Feb
12
awarded  Notable Question