Question

In a triangle ABC, mA=45, mB 40, and a=7. which equation sould you solve to find B?

Answer 1

Sin45/7 = sin40/b

Explanation:

:D

Answer 2

`(sin(45^o))/(7)=(sin(40^o))/(b)`

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

`(sin(A))/(a)=(sin(B))/(b)`

substitute the given values

`(sin(45^o))/(7)=(sin(40^o))/(b)`

solve for b

`b=(7)sin(40^o)/sin(45^o)`

`b=6.4\ units`