In the given fig. PQ is tangent at point R of the circle with centre O. if ∠TRQ = 300, find ∠PRS
Given PQ is tangent at point R and ∠TRQ = 300,
∠PRQ= 1800
∠QRT = 300
∠TRS =900 [∵Tangent of a circle is perpendicular to Radius]
∴∠PRS = 1800−1200= 600