What is the chord length of a straight line passing through the origin with an inclination of π / 6 cut by the circle x ^ 2 + y ^ 2-4x = 0? What is the chord length of a straight line passing through the origin with an inclination of π / 6 cut by the circle x ^ 2 + y ^ 2-4x = 0? I have a poor foundation. The more detailed I am, the better. I'd better write down the concepts involved,

Using geometric method to solve the intuitionistic and easy to understand circle x ^ 2 + y ^ 2-4x = 0, we can deform it into circle center formula (X-2) ^ 2 + y ^ 2 = 4. Through the circle center formula, we can clearly understand that the circle center is at x = 2, y = 0 and the radius is 2. We can know that the circle boundary passes through the coordinate origin. The origin is tentatively O. then we can see the inclination angle of straight line

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