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## Main Question or Discussion Point

I am learning how to prove conditional identities like

(a^2-c^2+b^2+2ab)/(c^2-a^2+b^2+2bc) = (s-c)(s-a)

if a+b+c = 2s

- Derived from Herons formula

I have understood the proof for the above , but i want more problems to work on.

Can anyone suggest some link where i can find similar problems/more explanation on conditional identities?

I searched a lot , but couldnt find anything at all.

It would be great if you could tell me about how to formulate such conditional identities by taking a formula like herons law.

(a^2-c^2+b^2+2ab)/(c^2-a^2+b^2+2bc) = (s-c)(s-a)

if a+b+c = 2s

- Derived from Herons formula

I have understood the proof for the above , but i want more problems to work on.

Can anyone suggest some link where i can find similar problems/more explanation on conditional identities?

I searched a lot , but couldnt find anything at all.

It would be great if you could tell me about how to formulate such conditional identities by taking a formula like herons law.