Q4 of 80 Page 302

In a right angled triangle PQR, ∠Q=90°, ∠R=45°; if PR = 3√2, then let us find out the lengths of two sides PQ and QR.


To Find: PQ and QR


Given: PR = 3√2 and ∠Q=90°, ∠R=45°





PQ = 3


Now, we also know that


cos θ =




QR = 3


Hence PQ = 3 units and QR = 3 units


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