## 80 Reputation

5 years, 94 days
Just a student trying to learn maple.

## @mmcdara  Thanks.  It is a co...

Thanks.  It is a common way to express compositions of flow rates within Chemical Engineering.  0.78 kg of CO2 per kg of feed.

## Showing Time...

@Rouben Rostamian

I've been playing aorund with the tool and it's been really helpful understanding a bunch of mixed cases; do you know if it is possible to put a the time on the graph and see the different time points? Kind of like a stop watch

## Thank You...

Sorry about the confusion Ux(0,t) = 0 and Ux(L,t) = 0 were supposed to be Neumann (I thought subscript x would've helped implying they were differentiated)

## @Rouben Rostamian     That&#...

That's what I meant! Sorry on the late response.

## @Carl Love    Yep that worke...

Yep that worked; thank you!

## Thanks for the response...

Hi,

The fibbonacci is known for being expressed recursively and this is done through an explicit method via adding the diagonals of pascals triangle. At school I am unable to use maple during assessments; however, I programmed this into my TI-84 so I will be able to tell any term of the fibbonacci sequence. That's why it is scary looking.

## it gives fibonacci numbers ...

it gives fibonacci numbers

## I'm wasting your time; sorry....

I figured it out I guess. Differential_Equation_slope_field_SOLUTION.mw

I'm sorry.

## Excell_Sheet.xlsx   Here's th...

Excell_Sheet.xlsx

Here's the sheet. Thanks

## Sorry...

Ah yes;

Persay we had a parametrics set: [sin(3t),cos(3t)]

The period is 2pi; how would I tell it find the intersection points from 0 to 2pi.

## Thank you...

Thank you;

I have one question.  How would I create a restricted domain; persay, 0, 2pi?  I am only able to obtain values from 0,pi.

Thank you!

Thank You!

## The Actual Problem...

hi, thank you for your quick response; this is what I am trying to do:

s(t) = <cos(t), sin(t)>

v(t) = <-sin(t), cos(t)>

a(t) =  <-cos(t), -sin(t)>

These are vectors expressed in parametric form; it is a circle.  In physics, we know that velocity vectors are tangent to circle whereas acceleration is perpendicular to the velocity vector.  What I'm trying to do is represent a numerous tangent lines on the parametrically expressed circle.

In general terms, we can represent a vector line segment as:

[a,b] + t[c,d]

To represent the velocity vectors, we do:

<cos(t), sin(t)> + q<-sin(t),cos(t)>

From this, I wish to tell maple to substitute a bunch of values into q so I can create multiple equations.

In Derive6.1, the notation is vector(<cos(t), sin(t)> + q<-sin(t),cos(t)>, t, 0, 2Pi, Pi/30)