Math Is Fun Forum

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

Bob

Administrator

Registered: 2010-06-20

Posts: 10,646

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

---

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jacks

Member

Registered: 2012-11-21

Posts: 132

Re: Triangle ABC

Thanks Bobbundy Got it