Answer:
4th option
Step-by-step explanation:
We require to find the 3rd angle in the triangle, that is
third angle = 180° - (75 + 50)° = 180° - 125° = 55°
Using the Sine rule in the triangle
[tex]\frac{x}{sin75}[/tex] = [tex]\frac{13}{sin55}[/tex] ( cross- multiply )
x × sin55° = 13 × sin75° ( divide both sides by sin55° )
x = [tex]\frac{13sin75}{sin55}[/tex]
