WEEK 17. Sin Law

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There is a law that can help us to solve a triangle, “Sin Law”. For using this law, you should have at least 2 side and one angle or 2 angle and one side. For example in \Delta ABC the law is:

\frac {a}{sinA} =\frac {b}{sin B} =\frac {c}{sin C}

Example: In \Delta QPR , \angle Q=30, \angle P=60 and side p=3. Find the missing sides and angle.

180-(30+60)=90

r^2=q^2+p^2

\frac {3}{ \sqrt {\frac {3}{2}}} = \frac {q}{\frac {1}{2}}

q=1.8

1.8^2 + 3^2=r^2

r=3.5

 

 

 

 

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