Answer:
Step-by-step explanation:
cos(2x+√3)+cos 2x=0
2 cos (2x+√3+2x)/2 cos (2x+√3-2x)/2=0
or cos(2x+√3/2) cos √3/2=0
or cos (2x+√3/2)=0=cos (2n+1)π/2
or 2x+√3/2=(2n+1)π/2
or x=(2n+1)π/4+√3/4
x=π/4+√3/4=(π+√3)/4,(3π+√3)/4,(5π+√3)4,(7π+√3)/4,(9π+√3)/4,(11π+√3)/4,(13π+√3)/4,(15π+√3)/4
(4π=4×3.14=12.56 nearly)
or
