Question

Given a= 200 and angle A=120 , angle B=30 , what does c= ?

Answer 1

SOLUTIONS

C = 180 - (120 + 30) = 180 - 150 = 30 degree

Using sine rule formular

$\frac{a}{sinA}=\frac{b}{sinB}=\frac{c}{sinC}$

a = 200 , A = 120 , C = 30, c = unknown

$\begin{gathered} \frac{200}{sin120}=\frac{c}{sin30} \\ c=\frac{200sin30}{sin120} \\ c=115.47 \end{gathered}$

Therefore the value of side c = 115.47