Question

The tangent at a point C of a circle and a diameter AB when extended, intersect at P. O is the centre of the circle. If ∠PCA = ${120}^{\circ }$, then find the value of ∠COB.

• A. ${60}^{\circ }$
• B. ${75}^{\circ }$
• C. ${90}^{\circ }$
• D. ${45}^{\circ }$

Answer 1

The correct option is A ${60}^{\circ }$