` PQ` is a tangent at a point `C` to a circle with centre `O` if `AB` is a diameter and angle `CAB =30^@,` find angle `PCA.`

In figure PQ is a tangent at a point C to a circle with centre O. If AB is a diameter and angleCAB = 30^@ , find anglePCA

In 2, PQ is a tangent at a point C to circle with centre O. If AB is a diameter and angleCAB=30^(@) then find anglePCA .

In the given figure, PQ is the tangent at a point C on a circle with centre O. If AB is a diameter and |__CAB=30^(@) , find |__PCA .

PQ is tangent at a point R of the circle with centre O. If ST is a diameter of the circle and angle TRQ = 30^(@) find angle PRS

AB is a diameter of a circle with centre O and AT is a tangent. If angle AOQ = 58^(@) find angle ATQ .

In the given figure, PQ is a tangent at a point R of the circle with centre O. If angle TRQ = 30^(@) , then angle PRS is equal to

PQ is a tangent drawn from a point P to a circle with centre O and QOR is a diameter of the circle such that angle POR =120^(@) . Find angle OPQ .

In the figure, PA is a tangent from an external point P to the circle with centre O and diameter AB. If angle POB = 110^@ , then the measure of angle APO is:

PQ is a tangent drawn from a point P to a circle with centre O and QOR is a diameter of the circle such that /_POR=120o, then /_OPQ is 60o (b) 45o (c) 30o (d) 90o