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## #1 2013-01-05 21:02:49

jacks
Member
Registered: 2012-11-21
Posts: 132

### Triangle ABC

If the Sides

and Opposites angles of
are varing such a way that Circum-Radius Remain Constant.

Then the value of

options:

(1) 0                (2) a+b+c                      (c) a sin(A)+b sin(B) +c sin(C)                    (d) None of these

Where da,db;bc are derivates of a,b and c

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## #2 2013-01-06 20:14:17

bob bundy
Registered: 2010-06-20
Posts: 8,021

### Re: Triangle ABC

hi jacks

Where da,db;bc are derivates of a,b and c

'da' is only part of the correct calculus notation here.  What are you differentiating with respect to?

The following may help.  R is the radius of the circumcircle.

Sine rule.

so, for example:

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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## #3 2013-01-17 18:40:54

jacks
Member
Registered: 2012-11-21
Posts: 132

### Re: Triangle ABC

Thanks Bobbundy Got it

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