## onegirl Group Title Find the sum of sin2x and sinx one year ago one year ago

1. CliffSedge Group Title

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

2. onegirl Group Title

its trig identities

3. CliffSedge Group Title

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 Group Title

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. onegirl Group Title

yea in terms of sinx