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seen May 19 at 7:47

Mar
28
answered Differentiation help required!
Mar
28
comment Solving $\sqrt{x}-2\sqrt[4]{x}-8 = 0$
Hint: Denote $u=\sqrt[4]{x}$, you will get $\sqrt{x}=u^2$.
Mar
27
comment How to count angle between vector and horizontally oriented vector?
That plot is not quite right, look at the scales of x and y axises. If you want to see the actual angle you must have the same scale on both of them. Imagine $AB=4mm$ and $BC=136mm$, do you see how big is angle $CAB$?
Mar
27
comment How to count angle between vector and horizontally oriented vector?
How did you get numerator 2, it should be 1? Double check your code in that part.
Mar
27
comment How to count angle between vector and horizontally oriented vector?
I am sure you miss the arccosine, check that too. And make sure you are calculating length with the right formula: len(v)=sqrt(v.x*v.x + v.y*v.y).
Mar
27
answered How to count angle between vector and horizontally oriented vector?
Mar
26
answered For which $a$ does $\lim_{x\to a}f(x) = \lfloor x \rfloor$ exist?
Mar
26
answered Probability of Student being in a Language class
Mar
26
comment How to get the minimum angle between two crossing lines?
Right, that's absolute value.
Mar
26
revised How to get the minimum angle between two crossing lines?
added 6 characters in body
Mar
26
revised How to get the minimum angle between two crossing lines?
deleted 71 characters in body
Mar
26
comment How to get the minimum angle between two crossing lines?
Hmm, I think I made an error there. Let me review it.
Mar
26
revised How to get the minimum angle between two crossing lines?
added 124 characters in body
Mar
26
answered How to get the minimum angle between two crossing lines?
Mar
26
answered Amount of information a hidden state can convey (HMM)
Mar
25
comment Find$\frac{dz}{dx} \text{for} \ z = \frac{xy}{x^2+ y^2}$
I also find your answer right. Maybe you misanderstood the question and it asks for something else?
Mar
24
comment How to tackle questions involving count?
In case of real problems(not math exercises), you can use any programming or scripting language to write basic programs.
Mar
24
answered Sum of total scores odds will end even or odd
Mar
24
comment LOVES+LIVE=THERE. How many “loves” are “there”?
You can't take LOVES=89990, all the digits must be different.
Mar
24
answered $\dfrac{\partial u}{\partial x}\dfrac{\partial u}{\partial y}=1$