Answer:
3/5
Step-by-step explanation:
1. Establish the Equation: SinA = [tex]\frac{21}{35}[/tex]
2. simplify [tex]\frac{3}{5}[/tex]
sinA = [tex]\frac{3}{5}[/tex]
sinA = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{21}{35}[/tex] = [tex]\frac{3}{5}[/tex]
