please answer this question.
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Radius of the circle is 2 cm
Step-by-step explanation:
Firstly join OA
angle OAT = 90°, because AT is a Tangent and tangent is perpendicular to the radius at the point of intersection.
As the triangle is a right triangle, we can apply Trigonometry,
Sin theta = P/H
=> Sin T = OA/OT
=> Sin 30° = OA/4
=> 1/2 = OA/4 (Sin 30° = 1/2)
=> OA = 4/2 = 2cm
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