code: public void set( float radians )
  	{
  		float c = (float)StrictMath.cos( radians );
  		float s = (float)StrictMath.sin( radians );
  
  		m00 = c;
  		m01 = -s;
  		m10 = s;
  		m11 = c;
  	}
docs: Sets this matrix to a rotation matrix with the given radians.
  @param radians Rotation in radians.