Zol Tun Kul
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 Sep 28 accepted Calculating $\lim_{x\to-\infty}\left(\sqrt{4x^2-6}-\sqrt{4x^2+x}\right)$ Sep 27 accepted Solving $\lim_{x\to0}\frac{1-\sqrt{\cos x}}{x^2}$ Sep 27 accepted Evalutating $\lim_{x\to0}\frac{1-\cos x}{x^2}$ Sep 27 accepted Calculating $\lim_{x\to 0}\frac{\sec (x)-1}{x^2\sec(x)}$ Sep 26 accepted Why is $|x| = -x$ in $\lim_{x\to-\infty}\frac{3-x}{\sqrt{2x^2-1}}$? Sep 25 accepted Solving $\lim_{x\to0}\frac{x}{\sqrt{1-3x}-1}$ without L'Hopital Sep 22 accepted Solving $\lim _{x\to 1}\left(\frac{1-\sqrt[3]{4-3x}}{x-1}\right)$ Sep 22 accepted Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital. Aug 10 accepted Getting the quadratic function given the vertex and one point. Jul 13 accepted Finding the acute angle between the planes $x-3y+2z=14$ and $-x+y+z=10$ Jul 13 accepted Having a plane equation equaled to zero for calculating its angle with another plane Jul 13 accepted The intersection line between $2x-5y+z=0$ and $y=0$ Jul 13 accepted What does it matter that this angle is the smallest between these two vectors? Jul 12 accepted Finding the intersection point between two lines using a matrix Jun 15 accepted Getting the number of significant digits in a multiplication/division. Jun 14 accepted Get the mass of air given the dimensions of a room. Oct 24 accepted Does the line $(2,1,1)+t(-3,1,5)$ live within the plane $31x+3y+18z=62$? Oct 24 accepted The normal equation of the plane that contains the line $(1,1,1) + t(-2,0,3)$ Oct 24 accepted Why isn't the orthogonal vector to a direction vector of a plane not necessarily perpendicular to such plane? Oct 3 accepted Deriving $\frac{8}{\sqrt{x-2}}$