Решить уравнение 2sin(π/2+х)=0
2sin(π/2 + x)=0 sin(π/2 + x) = 0 π/2 + x = πn, n∈Z x = -π/2 + πn, n∈Z
2 sin(π/2-x)-√2=0 2 sin x - √2=0 2 sin x= √2 sin x =√2/2 x= π/4