Вариант 6. Таск 2

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

int main() {
    double a, b, c;
    int n;
    scanf("%lf%lf%d", &a, &b, &n);
    c = (b - a) / n;

    for (double x = a; x <= b; x += c) {
        printf("%lf | ", x);
        if (x <= -1)
            printf("%lf", 5 / (1 + exp(-2 * x)));
        else if (x <= 15)
            printf("%lf", 4.9 / (2 + (x + 2) * sin(3 * x)));
        else
            printf("%lf", 1.3 * fabs(cos(4 * x)));

        printf("\n");
    }

    return 0;
}