Let D be the other point of intersection between AP and the circle.
A chord BC and the diameter from A meet at a point P such that OC = CP. If angle CPO = a, prove that angle AOB = 3a. This is a method of trisection an angle by construction.
What does this trisection of angle mean? Are there any other methods of solution?
Sorry, i am just not seeing it. Mabey its the notations, that i am not use to.
Can you just tell me what arcCD represents? Is it subtended at centre or circumference.
And i can guess that m is the angle size?
And also, the 2nd line, containing m(arc AB) - m(arc CD), what rule is that? Just point me in the right direction?