Review the proof: (Attached Image) Which expression will complete step 3 in the proof?

a) sin2(x)
b) 2sin(x)
c) 2sin(x)cos(x)
d) sin(x)cos(x) + sin(x)

lol, i have been using this product for a while and the second half of the year for a lon and the first time in a long time ago that the government has not yet received enough votes to be a good the first place in the world to be able to do it in my world life, i

answer: i dont get it ur bad

step-by-step explanation: boi