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scanf("%f", &ang);
ans = atan(ang);
printf("%
return 0;
}</source>
== Notable differences ==
The similar functions defined here have notable difference when it comes to return value of "tricky" numbers. For example, using sqrt to compute [[square root]] of -25 returns -[[NaN|nan]], whereas, csqrt returns 0.000000. Such differences may be noticed in other functions also.
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