If Fig , AOB is diameter of a circle with centre O and AC is a tangent to the circle at A . If `angle BOC = 130^@ ` , then find `angleACO` .

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, AOB is a diameter of a circle with centre O. Find tan A tan B.

In the given, figure , O is the centre of the circle and AD is a tangent to the circle at.A if angle CAD =55^@ and angle ADC=25^@ , then find angle ABO .

In fig AB is chord of a circle with centre O and AP is the tangent at A such that angleBAP = 75^@ find angleACB

In the circle with centre O and A,B,C are the points on the circle, angle AOB = 60^(@) . Find angle ACB

If AOB is a diameter of a circle and C is a point on the circle, then AC^(2)+BC^(2)=AB^(2) .

In the given Fig., AC is diameter of the circle with centre O and A is point of contact, then find x.