devkitPro

Hi! Why is sin and cos not working?
I have math.h imported. but sin and cos are not working. Why is this?
Code:
#include "Intellisense.h"
#include <gba_interrupt.h>
#include <gba_systemcalls.h>
#include "gba_input.h"
#include <stdint.h>
#include <math.h>
#include <stdbool.h>

typedef uint8_t u8 ...