Question

in a circle with center 'O' Ac is a tangent at 'A'.if oc=4cm and angle Aco=30degree then the radius of the circle is
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Answer 1

Answer:

2 cm

Step-by-step explanation:

GIVEN,

Centre of the circle is O

OC = 4 cm

Angle ACO = 30°

Find,

Radius of circle = x cm ( Let )

By using Trigonometry Method,

Sin a° = perpendicular/ Hypotheses

Therefore,

=>Sin 30° = x cm /4 cm

Since, Sin 30° = 1/2

=>1/2 = x / 4

=>x = 2 cm

Hence Solved

Hope it will help you