Question

Tolong bantu ya nomor 2. a,b,c

Answer 1

(a)
tan 1/2 x = tan Π/6
1/2 x = Π/6
x = Π/6 . 2/1 = Π/3

(b)
sin 1/3 x = sin Π/9
1/3 x = Π/9
x = Π/9 . 3/1 = Π/3

(c)
cos 2x = cos 2/5 . Π
2x = 2/5 . Π
x = 2/5 . Π . 1/2 = Π/5