trigonometry
posted by lindsay .
Find the general solution for f(x) = 27 tan^2 x9=0

27tan^2 x = 9
tan^2 x = 1/3
tanx = ± 1/√3
x = 30° , 150° , 210° or 330°
general
x = (30 + 180k)° , where k is an integer
x = (150+180k)° , where k is an integer