Hi,

Can you help me with the following question please?

3sinx = sin3x

My working:

3sinx - sin3x = 0

3sinx - sin(x + 2x) = 0

3 sinx - sinx - sin2x = 0

2sinx - 2sinxcosx =0

2sinx ( 1 - cos x) = 0

2 sinx = 0 x= 0 x = 0 and 360 degrees

1 - cos x = 0 cos x = 1 x = 0 and 360 degrees.

Can you help I think I have missed a value between 0 and 360?

Thanks

Cromlix