Find all solutions of the equation on the interval [0,2π] 1) 3 tan x -√3 =0 2) 4 cos² x - 1 = 0

1)



now, let's take a peek at your Unit Circle, as you should have one, if you don't, this is a prime time to get one, you'll need it, you can find many online, or I can post one here for you, many good ones.  Anyhow, let's take a peek at π/6.





now, the tangent function is positive, if both the numerator and denominator have the same sign, that happens in the I Quadrant, as in π/6, but is also true in the III Quadrant, since both are negative.



2)