In Δ PQR , ∠Q = 90 , ∠R = 60 , PR = 42 , PQ = ?
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Answer:
tringle PQR is right angled tringle
there fore
Step-by-step explanation:
sin 60=√3/2
there fore, √3/2=PQ/PR
PQ=42×√3/2
PQ =21√3
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