In a Unit Circle what do the radian values mean?

1 Answer
BeeFree
Oct 22, 2015

A radian relates directly to the radius of the unit circle.

Explanation:

A unit circle, by definition, has a radius equal to 1 unit.

Also, 1 radian equals the length of the radius of the circle. So, for a unit circle , 1 radian = 1 unit.

If you measure the length around the entire unit circle (also known as the circumference ), it will equal #2pi# radians or approximately 6.28 units.

Relating this to circumference of a unit circle :

#C=2pir= 2pi(1)=2pi# or 6.28 units

hope that helped

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