## anonymous 3 years ago Find the sum of sin2x and sinx

1. anonymous

I don't understand the question. Don't you just add them together since that's what "sum" means?

2. anonymous

its trig identities

3. anonymous

Do you want it only in terms of sin(x)? Here's a list of identities. http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf

4. across

The best you can do is simplify the expression:$\sin2x+\sin x\\ 2\sin x\cos x+\sin x\\ \sin x(2\cos x+1)$

5. anonymous

yea in terms of sinx