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Cx51 User's Guide
#include <math.h> float asin ( float x); /* number to calculate arc sine of */
The asin function calculates the arc sine of the floating-point number x.
The asin function returns the arc sine of x.
For x ∈ [-1, 1], asin(x) → [-π/2, π/2]. For x ∈ (-∞, -1) ∪ (1, ∞), asin(x) → NaN.
acos, asin517, atan, atan2
#include <math.h> #include <stdio.h> /* for printf */ void tst_asin (void) { float x; float y; for (x = -1.0; x <= 1.0; x += 0.1) { y = asin (x); printf ("ASIN(%f) = %f\n", x, y); } }
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