The original equation was sin(x)=cos(x). The solutions can lie in the other variant, tan(x)=1 [sin(x)/cos(x) = tan(x) by default).

I looked at the sin/cos periodicity table and noticed one solution for both functions of cos(x) and sin(x): (pi/4, square root of 2/2). How could I find the other solutions; in other words, is there an equation to note them?