0,25-cos(+x)=sin*cos

Question

0,25-cos(+x)=sin*cos

Answer 1

0.25 - cos(p/2 + x) = sin(x/2)*cos(x/2)
0.25 +sin(x) = sin(x)/2
0.25 + sin(x) - sin(x)/2 = 0
sin(x)/2 = 0.25
sin(x) = -1/2
x = (-1)^(n+1) * p/6 + p*n