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Give the radian measure of the central angle of a unit circle and subtended by an arc of measure 1/2. Please and Thank you.
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I am here to fix an error of the previous solution.
= (where S is the length of an arc)
Substituting,
=
=
Notice to the sender: In this context it would be better to formulate the problem like this:
Give the radian measure of the central angle of a unit circle subtended by an arc of the length 1/2.