In triangle ABC mzA -45, mzB = 40", and a = 7. Which equation should you solve to find b?

asked Apr 20, 2020 67.5k views

3 votes

In triangle ABC mzA -45, mzB = 40", and a = 7. Which equation should you
solve to find b?

by Hpalu

6.1k points

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2 votes

Answer:

Option A.
$(sin(45\°))/(7)=(sin(40\°))/(b)$

Explanation:

we know that

Applying the law of sines in the triangle ABC

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

substitute the given values

$(sin(45\°))/(7)=(sin(40\°))/(b)$

$b=(7)/(sin(45\°))sin(40\°)\\\\b=6.4\ units$

Iwazovsky answered Apr 24, 2020

6.6k points

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