Question

True of false? Sin 2x = 2sin x cos x

Answer 1

Are they asking for proof?
Use the sum and difference formula for sin(u+v)=sinucosv+cosusinv
2x=x+x, now sub x for u and x for v

Answer 2

sin(x+x)=sinxcosx+cosxsinx
sin(2x)= 2cosxsinx

Answer 3

thanks this statement is true