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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 $\frac{8}{\sqrt{x-2}}$
Oct
1
accepted Why $(-1 \cdot h) = -1$ when $h$ approaches $0$?
Sep
20
accepted Proving that $\lim_{x\to3}\frac{x}{4x-9}=1$
Sep
19
accepted Proving $\lim_{x\to1}(x^2+3)=4$
Sep
7
accepted For what values of $p$ and $b$ is the vector $(b,8,b+7)$ a solution of this system?
Sep
5
accepted Determining the values of $b$ in $Ax=b$ to have a consistent system.
Sep
1
accepted Is $A$ invertible if $ABAB^2 = I$?
Aug
21
accepted Factoring $x^3-8$ by grouping
Jul
7
accepted Finding two matrices that permit a change of variable eliminating the crossed term.
Jul
6
accepted Surjective linear transformations: is checking for linear independency enough?