Помогите cos (x/2 - p/4) = 1/2

Question

Помогите
cos (x/2 - p/4) = 1/2

Answer 1

Cos(x\2-p\4)=1\2
x\2-p\4=+- P\3+2Pn
x\2=+-P\3+P\4+2Pn
x=+-2P\3+3P\4+Pn