hello(adsbygoogle = window.adsbygoogle || []).push({});

i have to simplify this :

sin(a)sin(b-c) + sin(b)sin(c-a) + sin(c)sin(a-b)

I did simplify it and I got it equal to zero. But my problem is, I did too many steps in order to do that. Does anyone have a shorter way to simplify that ??

thx!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Simplify homework problem help

**Physics Forums | Science Articles, Homework Help, Discussion**