What is -pi in degrees?

1 Answer
George C.
May 16, 2015

#-pi# radians #= -180^o#

A radian is the angle subtended by an arc of a circle of length equal to the radius. If a circle has radius 1, then an angle of 1 radian defines an arc whose curved length is 1. #2pi# radians will take you once round the circle.

Degrees divide the angle of a complete circle into 360 divisions. #360^o# takes you once round the circle.

So #2pi# radians is the same as #360^o# and #pi# radians is #180^o#.

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