Question

Решить уравнение. Безумно срочно. 

Answer 1

2cos(x/2-π/4)cosπ/3=1
cos(x/2-π/4)=1
x/2-π/4=2πN
x=π/2+4πN первое

Answer 2

2cos(x/2-π/4)*1/2=1
cos(x/2-π/4)=1
x/2-π/4=2πn
x/2=π/4+2πn
x=π/2+4πn