In the adjoining figure, O is the centre of the circle. If ∠AOB = 90°and ∠ABC = 30°, then ∠CAO is equal to :
A. 30°
B. 45°
C. 90°
D. 60°
Answer:D
In the adjoining figure, O is the centre of the circle. If ∠AOB = 90°and ∠ABC = 30°, then ∠CAO is equal to :
A. 30° B. 45° C. 90° D. 60°