func (a RA) XY() XY {
	return XY{a.R * math32.Cos(a.A), a.R * math32.Sin(a.A)}
}
XY returns the cartesian representation of the vector.
package coord
import (
	"math"
	"github.com/cozely/cozely/x/math32"
)
type RA struct {
	R float32  
	A float32  
}
func (a RA) Cartesian() (x, y, z float32) {
	return a.R * math32.Cos(a.A), a.R * math32.Sin(a.A), 0
}