Answer:
[tex]\frac{sin(45^o)}{7}=\frac{sin(40^o)}{b}[/tex]
Step-by-step explanation:
The correct question is
In a triangle ABC, m∠A=45°, m∠B 40°, and a=7. which equation should you solve to find b?
we know that
Applying the law of sines
[tex]\frac{sin(A)}{a}=\frac{sin(B)}{b}[/tex]
substitute the given values
[tex]\frac{sin(45^o)}{7}=\frac{sin(40^o)}{b}[/tex]
solve for b
[tex]b=(7)sin(40^o)/sin(45^o)[/tex]
[tex]b=6.4\ units[/tex]
