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 Mar28 awarded Critic Mar28 answered Differentiation help required! Mar28 comment Solving $\sqrt{x}-2\sqrt[4]{x}-8 = 0$ Hint: Denote $u=\sqrt[4]{x}$, you will get $\sqrt{x}=u^2$. Mar27 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 $CAB$? Mar27 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. Mar27 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). Mar27 answered How to count angle between vector and horizontally oriented vector? Mar26 answered For which $a$ does $\lim_{x\to a}f(x) = \lfloor x \rfloor$ exist? Mar26 answered Probability of Student being in a Language class Mar26 comment How to get the minimum angle between two crossing lines? Right, that's absolute value. Mar26 revised How to get the minimum angle between two crossing lines? added 6 characters in body Mar26 revised How to get the minimum angle between two crossing lines? deleted 71 characters in body Mar26 comment How to get the minimum angle between two crossing lines? Hmm, I think I made an error there. Let me review it. Mar26 revised How to get the minimum angle between two crossing lines? added 124 characters in body Mar26 answered How to get the minimum angle between two crossing lines? Mar26 answered Amount of information a hidden state can convey (HMM) Mar25 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? Mar24 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. Mar24 answered Sum of total scores odds will end even or odd Mar24 comment LOVES+LIVE=THERE. How many “loves” are “there”? You can't take LOVES=89990, all the digits must be different.