- #1

seanistic

- 23

- 0

sin(x)+2sin(x)cos(x)=0

Correct me if I am wrong but you can only solve this if the equation consists of all sin(x) or all cos(x). I realize that 2sinAcosA = sin2A but I am in section 1 which is "simple trigonometric equations" and section 2 is "using identities in trigonometric equations" so I don't see why they would put a problem that uses identities in sections 1.