void setup() {
  double x = 0;
  double y = 0;
  double z = 0;

  double a = atan2(y, x)
  double l = sqrt(x*x + y*y)
  double h = sqrt(l*l + z*z)
  double phi = atan(z / l) * (180 / PI)
  double theta = acos((h / 2) / 75) * (180 / PI)

  double b = phi + theta
  double c = phi - theta

  Serial.begin(115200);
  Serial.println("It is A: " + a + " B: " + b + " C: " + c);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}