2sinx/3 - 1=0
2sinx/3=1
sinx/3=1/2
x/3=(-1)ⁿ·arcsin1/2+πn, n∈Z.
x/3= (-1)ⁿ·π/6+πn, n∈Z.
x= (-1)ⁿ·π/2 +3πn, n∈Z.
8/15 и 11/12 = 32/60 и 55/60
9/10 и 5/12 = 54/60 и 25/60
13/12 и 13/18 = 78/72 и 52/72
11/30 и 8/45 = 33/90 и 16/90
11/20 и 9/16 = 44/80 и 45/16