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May
21
answered Perpendicular vectors in 3d
May
20
comment Freefall with terminal velocity - expressions for velocity and position
Drag acts against gravity. Positive is down, and drag is acting upwards (thankfully for parachuters).
May
20
comment Characteristic Polynomial of $4×4$ matrix
Changed the letter x with symbol × in the title.
May
20
revised Characteristic Polynomial of $4×4$ matrix
edited title
May
20
comment Freefall with terminal velocity - expressions for velocity and position
You can easily show that $\mathrm{d}t=\dfrac{1}{\frac{\mathrm{d}v}{\mathrm{d}t}}\mathrm{d}v=\frac{1}{\dot‌​{v}}\mathrm{d}v$ and $\mathrm{d}x=v\mathrm{d}t=\frac{v}{\dot{v}}\mathrm{d}v$
May
20
answered Freefall with terminal velocity - expressions for velocity and position
May
19
revised A line through the point P(8, -7) is a tangent to the circle C at the point T. Find the length of PT.
added 10 characters in body
May
19
comment A line through the point P(8, -7) is a tangent to the circle C at the point T. Find the length of PT.
This is the same as my response, only you gave out the numerical answer instead of only the methodology.
May
19
answered A line through the point P(8, -7) is a tangent to the circle C at the point T. Find the length of PT.
May
18
comment When will $\operatorname{det}\left(A\cdot A^{\top}\right)=0$?
Yep. tex.stackexchange.com/questions/30619/…
May
18
comment When will $\operatorname{det}\left(A\cdot A^{\top}\right)=0$?
I changed ^{T} to ^{\top}. I think it looks better.
May
18
revised When will $\operatorname{det}\left(A\cdot A^{\top}\right)=0$?
Changed $T$ to $\top$
May
10
comment showing condition number of a matrix is the square root of $A^\top A$
I changed the transpose from ^T to ^\top.
May
10
revised showing condition number of a matrix is the square root of $A^\top A$
edited title, changed transpose from T to \top
May
1
revised If the distance between two lines is $ \frac{1}{\sqrt{3}} $, then $ \alpha $ is…
added 123 characters in body
May
1
revised If the distance between two lines is $ \frac{1}{\sqrt{3}} $, then $ \alpha $ is…
added 55 characters in body
May
1
answered If the distance between two lines is $ \frac{1}{\sqrt{3}} $, then $ \alpha $ is…
Apr
29
comment If a real linear operator $T$ satisfies $T^{t}T = TT^{t}$, is it necessarily true that $T = T^{t}$?
Try use \top for the transpose instead of t. Like $T^\top T$
Apr
27
answered Real analysis: simple second order ODE
Apr
27
answered How can I translate this problem into Matrix/Linear Algebra notation?