Question 8 AB is a diameter and AC is a chord of a circle with centre O such that ∠BAC=30∘. The tangent at c intersects extended AB at a point D. Prove that BC = BD.

Question 8 AB is a diameter and AC is a chord of a circle with centre

1.	Question 8 AB is a diameter and AC is a chord of a circle with centre O such that ∠BAC=30∘. The tangent at c intersects extended AB at a point D. Prove that BC = BD.
Answer» Question 8 AB is a diameter and AC is a chord of a circle with centre O such that $∠ B A C = 30^{\circ}$ . The tangent at c intersects extended AB at a point D. Prove that BC = BD.