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n a ∆PQR, PS⊥QR. If QS : SP : SR = 9 : 12 : 16, then the value of ∠PQR is always equal to

Answer» n a ∆PQR, PS⊥QR. If QS : SP : SR = 9 : 12 : 16, then the value of ∠PQR is always equal to


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