Items tagged with parametric

A family of curves has polar equation r=cos^n (theta/n), 0<=theta,n*pi, where n is a positive even integer.

Using t = theta as the parameter, find a parametric form of the equation of the family of curves and show that 

dy/dx = (sin(t)sin(t/n)-cos(t)cos(t/n)) /( sin(t)cos(t/n)+cos(t)sin(t/n))

on maple i tried

x:=((cos(t/n))^n)*cos(t):

y:=((cos(t/n))^n)*sin(t):

w:=diff(x,t)

z:=diff(y,t)

z/w

and i never got the above answer so i did

simplify(z/w)

and still never got the answer instead i got 

(cos(t/n)*sin(t/n)-sin(t)*cos(t))/(cos(t/n)^2-cos(t)^2)

 

 

 

 

Parametric equation of a circle in 3d by three points. Draghilev method.

CIRCLE_3_POINTS_geom3d_2.mw

In manual solution is no problem, but i am interest to compute it with any software such maple since i am not familiar, How to find solution in term of parametric equation a(r), b(r), c(r) for r=-5..5 and also visualize this three derivative condition? d(a)=a+b+c, d(b)=a-b+c, d(c)=a-b-c

 

i want parametrix answer for z in terms of w, what should i do ? please help

 

 

``

restart:

P:=w-10*z-1/5*z^2-1/200*z^3-1/500*z^4-z^5-1/1000*z^6

w-10*z-(1/5)*z^2-(1/200)*z^3-(1/500)*z^4-z^5-(1/1000)*z^6

(1)

solve(P,z)

RootOf(_Z^6+1000*_Z^5+2*_Z^4+5*_Z^3+200*_Z^2+10000*_Z-1000*w)

(2)

 

 

 

``

 

Download solve.mw

Hello awesome maple people

I have the following Matrix

R := Matrix([[1, -2, 2, 6, -6], [2, -3, 4, 9, -8]])

then i do

ReducedRowEchelonForm(R);

and i get an output, but is there any way to get it to give me the output in Parametric form?

Like this https://snag.gy/BQniuR.jpg

Thanks in advance :)

 

 

Hi!!

 

I am trying to plot the above curve:

 

restart; with(plots)

> f0 := proc (t) options operator, arrow; t, (-1)*3.9*t*(t-1) end proc; 

> IFS := proc (i, x, y) if i = 1 then return (1/2)*y, (1/2)*x end if; if i = 2 then return (1/2)*x, (1/2)*y+1/2 end if; if i = 3 then return (1/2)*x+1/2, (1/2)*y+1/2 end if; if i = 4 then return -(1/2)*y+1, -(1/2)*x+1/2 end if end proc; 

> g := proc (t) local j; for j to 4 do if evalf((1/4)*j-1/4) <= evalf(t) and evalf(t) <= evalf((1/4)*j) then return IFS(j, f0(4*t-j+1)); break end if end do end proc; 

 

Thus, the instruction  parametricplot(['g'(t),t=0..1]) return the message  

Error, (in plot) incorrect first argument [g(t), t = 0 .. 1]

Some idea or hit to plot this?

 

Thank you for your time

 

hi.how i can determind  eignvalue of matrix in the form parametric?

thanks1.mw

T := Matrix(5, 5, {(1, 1) = -b*beta*k/(c*u)-d, (1, 2) = 0, (1, 3) = -beta*lambda*c*u/(b*beta*k+c*d*u), (1, 4) = 0, (1, 5) = 0, (2, 1) = b*beta*k/(c*u), (2, 2) = -s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P-a, (2, 3) = beta*lambda*c*u/(b*beta*k+c*d*u), (2, 4) = -s*b/c, (2, 5) = r*(s-p)/s, (3, 1) = 0, (3, 2) = k, (3, 3) = -u, (3, 4) = 0, (3, 5) = 0, (4, 1) = 0, (4, 2) = -s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P, (4, 3) = 0, (4, 4) = -s*b/c-b, (4, 5) = r*(s+c)/s, (5, 1) = 0, (5, 2) = s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P, (5, 3) = 0, (5, 4) = s*b/c, (5, 5) = -r})

Matrix(5, 5, {(1, 1) = -b*beta*k/(c*u)-d, (1, 2) = 0, (1, 3) = -beta*lambda*c*u/(b*beta*k+c*d*u), (1, 4) = 0, (1, 5) = 0, (2, 1) = b*beta*k/(c*u), (2, 2) = -s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P-a, (2, 3) = beta*lambda*c*u/(b*beta*k+c*d*u), (2, 4) = -s*b/c, (2, 5) = r*(s-p)/s, (3, 1) = 0, (3, 2) = k, (3, 3) = -u, (3, 4) = 0, (3, 5) = 0, (4, 1) = 0, (4, 2) = -s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P, (4, 3) = 0, (4, 4) = -s*b/c-b, (4, 5) = r*(s+c)/s, (5, 1) = 0, (5, 2) = s*(lambda*c*k*beta/(b*beta*k+c*d*u)-a)/P, (5, 3) = 0, (5, 4) = s*b/c, (5, 5) = -r})

(1)

``

 

Download 1.mw

 

How I can solve it ? If I want a solution dependent of a. With fsolve? But how?

-x3+ax2-lnx=0
 

Suppose I have a function like this: f=cos(2t/m)+cos(2(t+5)/m).

 

Now for each fixed m, we get the maximum value of f. Then I want to build a plot where x-axis is m and y-axis is f, how could I do that? Please help!

 

Hi all,

I've got a parametric curve of the form f(x),h(x) x=0..1, and want to make an animation of this curve when changing an exogenous variable h0.

My attempt was to do it like this:

plots[animate](plot, [f(x), h(x), x = 0 .. 1], h0 = 0 .. 1)

but it doesn't work.

Does anyone know if/how this can be done?

Thanks,

Paul

Hello,

I would like to build a periodic curve but starting from a parametric curve and not with a function.

Thanks to you tips, I could obtain a periodic function with a piecewise function starting from a function (http://www.mapleprimes.com/questions/208795-Periodic-Piecewise-Function)

I would like to do the same approach but starting from this parametric curve f :

V:=Vector([cos(t),sin(t)]);
f:=unapply(V, t);
plot( [f(t)[1],f(t)[2], t = 0..evalf(Pi)],color=red, scaling=constrained);

And I would like to build a periodic curve (the period is defined on the x axis) g such as :

 

Unfortunately, the approach presented in the post http://www.mapleprimes.com/questions/208795-Periodic-Piecewise-Function does'nt work anymore.

Do you have ideas to build this periodic curve starting from the parametric curve defined above ?

The aim of my question is more linked to the methodolody than the result.

Thank you for your help.

How I can sketch the helix with parametric equations x=2cost  y=sint  z=t  and the line with parameric equation x=-2t  y=1  z=(pi/2)+t   on a three-dimensional coordinate system?

Suppose I have the parametric equations of a circle

x=cost

y=sint

where t runs from 0 to 2*pi. How can I show the orientation of this parametric curve on a plot?

we have a curve (x^2+y^2)^2=x^2-y^2

parametric representation of the curve is given by

x(t)=cos(t)/1+sin^2(t)

y(t)=sin(t)cos(t)/1+sin^2(t)

 

and we are asked to plot the curve using a parametric plot for -Pi<t<Pi

Hi!

For my lecture advanced dynamics, I got the question to make a sketch of the coordinate system and the particle’s motion, with the following position vector:

r(t) = (a cos(ωt))i + (b sin(ωt))j + (ct)k

In this function, ω is in [rad/s], a and b are in [m], t in [s] and c is [m/s].

I have no idea what this should look like, and I was thinking about plotting this with Maple, but thus far I'm not succeeding in plotting it. Which function or method can I use to visualize this in Maple?

Thanks a lot!

 

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