Question

what is sin2x+sinx=0 on interval [0,2pie)?

Answer 1

may be the question is incomplete

Answer 2

sin2x+sinx=0 use double angle
2sinxcosx+sinx = 0 factor sinx
sinx(2cosx +1)=0 use 0 product property

sinx=0
2cosx+1=0 or cosx =-1/2

Answer 3

where does sin = 0 from 0 to 2pi

and cosx = -1/2 same int??

Answer 4

sin=0 on 0,pie (remember sinpie=y value)

Answer 5

and cos -1/2