Let the coordinates of A be (x,y)AB is a diameter of the circle then Midpoint of AB is center of the circle which is (2,−3)Mid point of A and B=(2x1​+x2​​,2y1​+y2​​)∴(2,−3)=(2x+1​,2y+4​)⇒2x+1​=2⇒x+1=4⇒x=3⇒2y+4​=−3⇒y+4=−6⇒y=−10∴Coordinates of A is (3,−10).