Sine and Cosine Stating Negative Numbers the Radians 1

Now I just took some pics from wikipedia. That’s what happen when people are nice. Everybody becomes freeloaders.

Now smart ass mathematician often state angles in term of radians rather than degree. Radians are ratio between the length of the curve in front of the angel to the radius of the circle.

Because there are 360° of angle in the circle, and the circumference of a circle is 2π it’s radius, we would expect 360° to be equivalent with 2π radians. Radians are dimensionless being just ratio.

So 180° is just 180°/360°*2π=π

Simple?

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• December 13, 2010 -- Sine and Cosine Stating Negative Numbers the Radians 2