[Dev-C++] Math error

[Mihkel P. <mi...@ya...>]

 Hello,

 I wrote a very simple programme to test function
sin():

#include <stdio.h>
#include <math.h>

void main()
{
 float f=1.0f;
 printf("The sine for %f is %f",f,sin(f));
 
}
, but it printed on the screen 
"The sine for 1.00000 is 0.841471".
Then I tried to calculate sine for 1.0000 on a
calculator and I found that sine for 1 is 0.017452...

What am I doing wrong?
(I'm sorry for the spelling mistakes)

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