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A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is
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- 30°
- 45°
- 60°
- 75°
- 30°
Correct Option: A
According to question , we draw a figure of a circle with centre O
OB = OC = radii
∴ In ∆ OBC,
OB = BC = CO
∴ ∠OCB = ∠OBC = ∠BOC = 60°
OC ⊥ DE
∴ ∠BCD = 90° – 60° = 30°