Solve the equation:
Cos^2x + cosx + 0
no equation
If you mean cos^2x + cosx = 0 then we have
cosx(cosx+1)=0
cosx = 0 or -1
x = pi/2 or pi or 3pi/2
Cos^2x + cosx + 0
If you mean cos^2x + cosx = 0 then we have
cosx(cosx+1)=0
cosx = 0 or -1
x = pi/2 or pi or 3pi/2