Question

Given ABC is a right triangle with right angle C AC = 15 centimeters and mA = 40 What is BC ? Enter your answer rounded to the nearest tenth, in the box cm

Answer 1

First we calculated the missing angle

angle=180-90-40

angle =50

using the law of sines we can obtain BC

$\frac{15}{\sin(50)}=\frac{BC}{\sin(40)}$$BC=\frac{\sin (40)15}{\sin (50)}=12.58$