Math Is Fun Forum

sonawaneulhas

Member

Registered: 2009-11-17

Posts: 5

want help in dierivatives.

I have
k=(sqrt(2*mw*E0))/hx
q=(sqrt(2*mb*(vp-E0)))/hx
I want to find its derivative w.r.t E0?

I want above derivatives
because I want to find derivative of
(k*tan(k*b/2))-q;
w.r.t E0.

Any one please can help me?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: want help in dierivatives.

Hi sonawaneulhas;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

sonawaneulhas

Member

Registered: 2009-11-17

Posts: 5

Re: want help in dierivatives.

Hi bobbym
Thnx a lot for yor help.

Now again i am confused in case of q.
If I am wrong then can you please correct me?
for dq/dE0= -(mb/sqrt(2E0) hx)
Am i right?

And also I dnt knw how to implement these derivatives in
(k*tan(k*b/2))-q;

if you can then can you please help me?

Thanks in advance

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: want help in dierivatives.

Hi;

And also I dnt knw how to implement these derivatives in
(k*tan(k*b/2))-q;

I don't know what you are trying to do here.

Last edited by bobbym (2009-11-17 21:32:27)

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

sonawaneulhas

Member

Registered: 2009-11-17

Posts: 5

Re: want help in dierivatives.

Thnx alot bobbym.
Actually my main function is (k*tan(k*b/2))-q;
I am putting values of k and q as first two equations.
After that i have to find out derivative of (k*tan(k*b/2))-q; w.r.t. EO
because in this case my E0 is varying.
got or I am confusing you?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: want help in dierivatives.

Hi sonawaneulhas;

All you have to do now is substitute into (k*tan(k*b/2))-q,

with:

k=(sqrt(2*mw*E0))/hx
q=(sqrt(2*mb*(vp-E0)))/hx

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

sonawaneulhas

Member

Registered: 2009-11-17

Posts: 5

Re: want help in dierivatives.

Thanx alot bobbym.
You have solve my great problem....

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: want help in dierivatives.

Hi sonawaneulhas;

Glad to help. Let me see what you get when you are all done.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

sonawaneulhas

Member

Registered: 2009-11-17

Posts: 5

Re: want help in dierivatives.

yes definately...
I will tell u...
all these things i am going to introduce in a programme

Last edited by sonawaneulhas (2009-11-17 22:17:39)