3 marksSine and Cosine Rules
CSEC Mathematics · May/June 2012 · Paper 2 · Question 10(a)(ii)
The diagram shows a quadrilateral QRST in which QS = 7 cm, ST = 10 cm, QT = 8 cm, ∠SRQ = 60° and ∠RQS = 48°.
Calculate the measure of ∠QTS.
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