sin(3x) = cos(x + pi/4)
Thanks
i have plotted this function, sin(3x) - cos(x + pi/4) = 0, for x = 0 to 2pi
it does have 6 roots for x = 0 to 2 pi
using the sum to product formula, we have this
-2 sin (pi/8 -2x) cos (x + pi/8) = 0
this one form does not generate the 6 roots as shown in the plot, i wonder