In the given figure PQ and PR are two tangents on a circle with centre O. If ∠QPR=60∘, then ∠QRO=30∘.
In the following figure, PQ and PR are tangents to the circle, with centre O. If ∠QPR=60o, calculate :
(i)∠QOR, (ii)∠OQR, (iii)∠QSR,