The Sine Rule: Solving for Acute and Obtuse Angles
The Sine Rule: Solving for Acute and Obtuse Angles
Secondary 3
In triangle \(PQR\), \(PQ=11\) cm, \(PR=7\) cm and \(\angle PQR=25{}^\circ\).
Find the value of the obtuse angle \(PRQ\).
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Answer:\(138.4^\circ\)
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