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| Summary | #include <math.h> double tan ( double x); /* value to calculate tangent of */ |
| Description | The tan function calculates the tangent of the floating-point value x. |
| Return Value | The tan function returns the tangent of x. The value of x must be in the range ±2^32 (±4294967296.0). Outside this value range an NaN error is returned. For x = c (±π/2), {c = (2k+1); k ∈ N}, tan returns ±INF. |
| See Also | |
| Example |
#include <math.h>
#include <stdio.h> /* for printf */
void tst_tan (void) {
float x;
float y;
float pi;
pi = 3.14159265;
for (x = -(pi/4); x < (pi/4); x += 0.1) {
y = tan (x);
printf ("TAN(%f) = %f\n", x, y);
}
}
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