Given: AT is a tangent to the circle with center O such that OT = 4 cm and ∠OTA = 30°.
To find: The value of AT.
In △ OAT ,
OA ⏊ AT [Tangents drawn at a point on circle is perpendicular to the radius through point of contact]
∴OAT is a right - angled triangle at A and
AT = 2√3 cm
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