Question

решить уравнение
cos(x/3-pi/4)=0

Answer 1

cos ( x3 -π4) = 0
x3 - π4 = π2 +πn, n∈Z
x3 = π4+π2+πn, n∈Z
x3 = 3π4+πn, n∈Z
x= 9π4+3πn, n∈Z