Thursday

January 29, 2015

January 29, 2015

Posted by **Mitch** on Friday, December 18, 2009 at 12:42pm.

a.Explain why (dึ/ds) = (dึ/dt) (dt/ds).

b.Explain why tanึ = dy/dx, which equals (dy/dt) / (dx/dt).

- math -
**bobpursley**, Friday, December 18, 2009 at 1:05pmI have to assume you know the chain rule.

if x is a function of t, and f is a function of x, then

df/dt=df/dx * dx/dt

this is a fundamental relationship in calculus.

- math -
**Mitch**, Friday, December 18, 2009 at 1:24pmI understand that much, but I still cannot derive the curvation equation..

a.Let x prime and x double prime be the first derivative and second derivatives of x with respect to t, and similarly for y. Show the following in true.

dณ/ds = ( x y - x y ) / (vector V)^3

- math -
**Mitch**, Friday, December 18, 2009 at 1:26pmWow that did not work...

Prove

(dphi/ds) = ( xprime*ydouble prime - xdoubleprime*yprime ) / (vector V)^3

- math -
**Mitch**, Friday, December 18, 2009 at 2:26pmHelp?

- math -
**bobpursley**, Friday, December 18, 2009 at 4:41pmx prime. OK that is the first derivative of x with respect to ???

same for double prime. Your statement is just totally meaningless, it cant be proved unless it is understood.

- math -
**Mitch**, Friday, December 18, 2009 at 8:31pmI am trying to prove the formula..

**Answer this Question**

**Related Questions**

Algebra - Here is the problem: A two-digit number is eight times the sum of its ...

Algebra - Here is the problem: A two-digit number is eight times the sum of its ...

math - write the equation 5x plus y equals 2 which equals 0 in normal form. my ...

business report - i need help to write a business report using key terms (...

Algebra - 3 (in the nook) of the radical of 8 raised to the second power ...

Math - How do you solve second order initial value problems? I don't understand ...

Probability and Statistics - For question 1, here's the numbers you use: {20, 18...

math - Saying that 4<(sq.root of x)<9 is equivalent to saying what about ...

nutrition - What are some of the health problems associated with undernutrition...

math - So I've been having trouble solving some problems. Mainly problems that ...