Question

Find all solutions to the equation in the interval [0, 2\(\pi\)).

sin 2x - sin 4x = 0

Answer 1

@amistre64

Answer 2

might want to use double angle indentities

Answer 3

sin(a+b) = sina cosb + sinb cosa

when b=a, then sin(2a) = 2 sina cosa

but you might want to use that to reduce 4x instead of 2x

Answer 4

sin(2(2x)) = 2 sin(2x) cos(2x)

Answer 5

factor our the sin and you can determine the zeros