1. ISP

    Point Out An Error

    The following thread got closed before I could edit the last post. There is an obvious error in the last post that I would have edited out, so I would like it stated for the record that I never got the chance. http://mymathforum.com/number-theory/347456-solution-continuum-hypothesis.html...
  2. idontknow

    Distance from point

    Given point in space P(x_0 , y_0 , z_0 ) , find the minimal distance between point and sphere: (x - a)^2 + (y - b)^2 + (z - c)^2 = r^2.
  3. E

    Slope of the Unit Circle at Any Point

    How do you calculate the slope of the unit circle at any point? Unlike curves that can be written in the form y = ax^2 + bx + c, which are easy to take the derivative of, writing the unit circle in y = form would have a positive or negative in front of a square root.
  4. T

    Calculate third point of triangle given angle and line length

    I have a triangle with the three points named A, B and C. I know the coordinates of A and B and need to calculate C. I also know the angle a and that |AB|=|AC|. Unfortunately the only formulas for triangles I remember, are about calculating an unknown length or angle, and I need the coordinates...
  5. T

    Calculating endpoint of 3D line with start point and angle.

    So I need to calculate the start point (x1, y1, z1) of a 3D line of which I know the end point (x2, y2, z2), the angle which is 45 degrees, but where I also know y1. I furthermore know that y1<y2. So is there a simplified formula for this, given the additional info?
  6. G

    How to find direction of starting point from person?

    A person moving towards to the north and cover 10m distance. He turn to the right side and cover 15m distance again turns to the right side and cover 10m distance. Find the direction of starting point from person? I draw the direction diagram: How to find direction of starting point...
  7. G

    Generalized Fourier Integral and Steepest descent path, Saddle point near the endpoin

    I am looking forward to solving the integration in the following equation with the assumption that $ka$ is very large \begin{align} H = 2jka\int_{-\pi/2}^{\pi/2}\cos{(\varphi-\phi)}e^{jka[\cos{\varphi}+\cos{(\varphi-\phi)}]}\ d\varphi \end{align} I used the steepest descent path method to...
  8. S

    Neighborhood of a point

    Is a subset of a Neighborhood of a point is also a Neighborhood of the point? Justify This question is being asked as an exercise after explaining the definition of Neighborhood of a point. My deduction: At first go, it seems yes the statement is true. However, it says subset and not...
  9. M

    Floating Vs Fixed Point Controllers

    Generally all Micro controllers are Fixed point or Floating point? How do I know? How much accurate the floating point will be compared to fixed point?
  10. O

    The whole point of a forum ....

    A few days ago I posted a question relating to the forces and moments when bending wood. The question has been viewed by many but no one has answered. Surely the whole point of joining a forum is to exchange ideas skills knowledge etc. I am not a mathematician but have a real practical issue...
  11. G

    Find the moment of this Force about point A.

    A force of 1200N acts on a bracket as shown in the figure. Find the moment of this Force about point A. Find the moment of this Force about point A. Solution: I successfully resolved given force like this: I am confused at taking moments of components of 1200N force about point A. Here it...
  12. H

    Show these point form a square

    Show ACDE is a square C=10,2 A=4,2 E=8,-8 D=14,-4
  13. D

    Nearest Lattice Point

    Hanna moves in a lattice where every point can be represented by a pair of integers. She moves from point A to point B and then takes a turn 90 degrees right and starts moving till she reaches the first point on the lattice. Find what's the point she would reach? In essence the problem boils...
  14. P

    Boiling and Melting point of Liquids in space.

    https://www.britannica.com/science/boiling-point https://en.m.wikipedia.org/wiki/Boiling_point https://en.m.wikipedia.org/wiki/Melting_point Do the Boiling and Melting point of Liquids vary in Space? Thanks & Regards, Prashant S Akerkar
  15. P

    Simultaneous equations variant

    https://en.m.wikipedia.org/wiki/System_of_equations Can we have decimal points for the variables in Simultaneous equations? Example: 3.2x + 2.3y=5.1 4.1x - 3.2y=7.2 Calculate the value of x & y. Thanks & Regards, Prashant S Akerkar
  16. P

    Quadratic equation variant.

    https://en.m.wikipedia.org/wiki/Quadratic_equation Can Quadratic equation be in this variant? ax² + bx +c =0 Example: 1.5x*x+3.2x+5.3=0 Where a,b & c are decimal numbers. The formula for computing the real roots of the above quadratic equations form remains the same. Thanks & Regards...
  17. U

    Hypotenuse path from point A to B

    Hi I'm working on a simpel path for a target in a game. I want the target to diagonally through the hypotenuse since I know the legs. The target as the coordinates of point A, being the start point, and point B, the end point. The target also has a speed on which it should move n amount of...
  18. A

    Programs for floating point numbers to text.

    Reference : https://www.google.com/amp/s/www.geeksforgeeks.org/convert-number-to-words/amp/ Can we write computer programs which will convert a floating point or decimal number in words? Programming languages could be C,C++,Java,C#, Python etc. Example : Input 375.50...
  19. A

    Shares break-even point question

    I’ve posted this here as I’m sure it’s an algebra problem and it's driving me nuts. I want to calculate the break-even point of 2 positions via a formula. For example if I have a long position of (+ 5) @ 1261 and a short position of (- 3) @ 1251 What is the easiest way of...
  20. A

    Coordinates of a point in a three dimensional picture

    Please see the link for the image showing the problem here https://uk.mathworks.com/matlabcentral/answers/437311-is-there-any-way-of-working-out-the-coordinates-at-d-d-is-perpendicular-to-ab-in-the-plane-abc?s_tid=mlc_ans_email_view#answer_354052. I'm afraid I couldn't work out how to put the...