how to link math.h

hi all

When I run a program with trigonometric function like sin, cos,tan etc..

I get errors:

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

[jay@localhost test]$ nios2-linux-uclibc-gcc test.c -o test -elf2flt

test.elf2flt(.text+0x6c): In function `main&#39;:

: undefined reference to `sin&#39;

collect2: ld returned 1 exit status[/b]

--- Quote End ---

#include<math.h># include<tgmath.h>
main()
{
double angle;
angle = asin (60);
printf("angle = %f\n",angle);
}

What should I do?

thx in advance !