Calculating Sine Values in Scalene Triangles
Calculating Sine Values in Scalene Triangles
Secondary 3
In the diagram, \(PRS\) is a straight line, \(PQ=12\) cm, \(PR=7\) cm and \(\sin \angle QRS=\frac{4}{9}\).
Calculate the value of
- \(\sin \angle PRQ\),
- \(\sin \angle PQR\),
giving your answers as a fraction in its lowest term.
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Answer:(i) \(\frac{4}{9}\) (ii) \(\frac{7}{27}\)
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