Question

sin pi(x+3)/4= корень 2/2 cрочно

Answer 1

sinπ(x+3)/4=√2/2
π(x+3)/4=(-1)^n*π/4+πn,n∈z
x+3=(-1)^n*1+4n,n∈z
x=3+(-1)^n*1+4n,n∈z