25 lines
634 B
C
25 lines
634 B
C
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#include <stdio.h>
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#include <math.h>
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// z_1 = cos(3pi / 8 - alpha / 4)^2 - cos(11pi / 8 + alpha / 4)^2
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// z_2 = sqrt(2) / 2 * sin(alpha / 2)
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int main() {
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double alpha = 0, z_1 = 0, z_2 = 0;
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printf("Input Ɑ: ");
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if (scanf("%lf", &alpha) != 1){
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printf("\e[1;31m[ERROR] Alpha must be a double, restart the program.\n\e[0m");
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return 0;
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}
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z_1 = cos(3 * M_PI / 8 - alpha / 4) * cos(3 * M_PI / 8 - alpha / 4) - cos(11 * M_PI / 8 + alpha / 4) * cos(11 * M_PI / 8 + alpha / 4);
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z_2 = sqrt(2) / 2 * sin(alpha / 2);
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printf("z_1 = %lf\n", z_1);
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printf("z_2 = %lf\n", z_2);
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return 0;
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}
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