Answer:
y = 12.3 cm
Step-by-step explanation:
Since the triangle is right with hypotenuse 15, use the cosine ratio to solve for y, that is
cos35° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{y}{15}[/tex]
Multiply both sides by 15
15 × cos35° = y, hence
y ≈ 12.3
