A tangent ST to a circle touches it at B. AB is a chord such that `angle ABT=65^(@)`, Find `angle AOB`, where O is the centre of the circle.

A chord of the circle x^(2)+y^(2)=a^(2) cuts it at two points A and B such that angle AOB = pi //2 , where O is the centre of the circle. If there is a moving point P on this circle, then the locus of the orthocentre of DeltaPAB will be a

A chord of the circle x^(2)+y^(2)=a^(2) cuts it at two points A and B such that angle AOB = pi //2 , where O is the centre of the circle. If there is a moving point P on this circle, then the locus of the orthocentre of DeltaPAB will be a

If a Quardlateral is circumscribed of a circle and angle AOB is 135^(@) find angle COD . O is the centre of circle

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, A, B and C are three points on a circle with centre O such that angle BOC = 30 ^(@) and angle AOB = 60^(@). If D is a point on the circle other than the are ABC, find angle ADC.

In the given figure, A, B and C are three points on a circle with centre O such that angle BOC = 30^(@) and angle AOB = 60^(@) . If D is a point on the circle other than the arc ABC, find angle ADC .

In the given figure, A,B and C are three points on a circle with centre O such that angle BOC = 30^@ and angle AOB = 60^@ . If D is a point on the circle other than the arc ABC, find angle ADC .

The radius of a circle is 8 cm and O is its centre. If angle AOB=60^(@) and AB is a chord, then what is the length of the chord AB?