Answer:
21.4°
Step-by-step explanation:
Law of sines:
Triangle ABC:
sin A / a = sin B / b = sin C / c
In this case:
sin (x) / 12 = sin(42°) / 22
Multiply both sides by 12
sin (x) = (sin(42°)/22) x 12
sin (x) = 0.3650
Inverse Sine:
x = sin−1(0.3650)
x = 21.4°
