Cos(5x+п/6)=1/2 срочно

Question

Cos(5x+п/6)=1/2 срочно

Answer 1

Cos(x/5-pi/6)=V3/2
x/5-pi/6=+/-pi/6+2pin
1)x/5=2pin=>x=10pin
2)x/5=pi/3+2pin=>x=5pi/3+10pin,n€Z.