Question

FIND THE VALUE OF X


NO INCORRECT ANSWERS​

Answer 1

Answer: x = 12.5 cm.

Explanation: PR = 25 cm, QR = x cm.

So, cos R = QR/PR = x/25

But, cos R = cos 60° = 1/2.

∴ x/25 = 1/2

⇒ x = 25 × 1/2

⇒ x = 12.5 cm.