Answer:
x = 28.8
Step-by-step explanation:
Using the Sine rule in the triangle then
[tex]\frac{43}{sin87}[/tex] = [tex]\frac{x}{sin42}[/tex] ( cross- multiply )
x × sin87° = 43 × sin42° ( divide both sides by sin87° )
x = [tex]\frac{43sin42}{sin87}[/tex] = 28.8
