Hi there I just wanted to test if cos(). sin() works correctly.

So I just wanted get cos(0) ; displayed and I expect 1

But i recive

```
00Å.
```

this is my code

```
double x;
const float pi = 3.14;
float y;
void setup() {
// put your setup code here, to run once:
x=0.0;
y= cos(x*pi/180);
}
void loop() {
Serial.begin(9600);// r
// put your main code here, to run repeatedly:
Serial.println(cos(x*pi/180));
}
```