sin2x+sin4x=0? :: Homework Help and Answers :: Slader
Ask your peers! Answers to sin2x+sin4x=0? ... ... Cipher Zeblon 1 year, 11 months ago 1 sin(2x) + sin(4x) = 0 sin(2x) + 2sin(2x)cos(2x) = 0 sin(2x)[1 + 2cos(2x)] = 0 sin(2x) = 0 or 2cos(2x) = -1 -> cos(2x) = -1/2 when sin(2x) = 0 2x = 0, pi, 2pi, 3pi x = ...