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lab5task2.c

+#include <math.h>
+#include <stdio.h>
+
+
+
+
+int main (){
+	int matrix[4][3] = {
+		{1, 4, 6},
+		{2, -3, 1},
+		{3, 5, 0},
+		{3, 1, -3}
+	};
+	float lenght[4] = {0};
+	int i, j;
+	
+	for(i = 0; i < 4; i++){
+		for(j = 0; j < 3; j++){
+			lenght[i] += (pow(matrix[i][j], 2));
+		}
+	}
+	float angles[6] = {0};
+	float smth[6] = {0};
+	float anything[6] = {0};
+	int k = 0;
+	int t = 0;
+	for(i = 0; i < 4; i++){
+		for(j = 0; j < i; j++){
+			smth[t] = sqrt(lenght[i] * lenght[j]);
+			for(k = 0; k < 3; k++){
+				anything[t] += matrix[i][k] * matrix[j][k];
+			}
+			t++;
+		}
+	}
+	
+
+	for(i = 0; i < 6; i++){
+		angles[i] = acos(anything[i] / smth[i]);
+	}
+	for(i = 0; i < 6; i++){
+		printf("%f\n", angles[i]);
+	}
+	return 0;
+}
+		
+	
+