1.
a)x/2+ pi/6 = pi/6 + 2 pi l, l € Z
c) x/2+ pi/6= 5pi/6 + 2 pi n, n € Z
a)x/2= 0 + 2 pi l
x= 0 + 4 pi l
c) x/2= 2pi/3 + 2 pi n, n € Z
x= 4 pi/3 + 4 pi n
2.
-16 sin^2 x + 32 sin x cos x= 0(: cos^2 x
-16 tg^2 x + 32 tg x = 0
-16tg x( tg x - 2)= 0
-16 tg x= 0
tg x = 0
x= pi k, k € Z.
tg x= 2
x= arctg 2 + pi l, l € Z.