o_195h4n6al16jb186b1b2qs7fgssa.pdf

y = atan (x);
printf("The arctangent of%f is %f\n\n", x, y);
x = -1.0;
y = atan (x);
printf("The arctangent of%f is %f\n\n", x, y);
}
Output:
The arctangent of 2.000000 is 1.107149
The arctangent of -1.000000 is -0.785398
asinf (Continued)
Standard C Libraries with Math Functions
2004 Microchip Technology Inc. DS51456B-page 329
atanf
Description: Calculates the trigonometric arc tangent function of a single
precision
floating-point value.
Include:
Prototype: float atanf (float x);
Argument: x value for which to return the arc tangent
Return Value: Returns the arc tangent in radians in the range of -pi/2 to +pi/2
(inclusive).
Remarks: No domain or rangeerror will occur.
Example: #include /* for atanf */
#include /* for printf */
int main(void)
{
float x, y;
x = 2.0F;
y = atanf (x);
printf("The arctangent of%f is %f\n\n", x, y);
x = -1.0F;
y = atanf (x);
printf("The arctangent of%f is %f\n\n", x, y);
}
Output:
The arctangent of 2.000000 is 1.107149
The arctangent of -1.000000 is -0.785398
atan2
Description: Calculates the trigonometric arc tangent function of y/x.
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Ví dụ: # include / * Cho trần nhà * /
# include / * Cho printf * /
int main (void)
{
double x [8] = {2.0, 1.75, 1.5, 1.25, -2.0,
-1.75, -1.5, -1.25};
y kép;
int i;
for (i = 0; i