18 sin b = 8 sin 110 ?
I'm assuming you want to solve for b.
18sinb=8sin110
sinb=818sin110
sinb=49sin110
arcsin(sinb)=arcsin(49sin110)
b = -0.0197
18 sin b = 8 sin 110
sin b = 4/9 * sin 110
b = 24.69 degrees.
sin 110 is assumed sin 110deg.