refactoring: description added for double

src/trigonometricFunctions.c

@@ -4,20 +4,20 @@
 #include <stdio.h>
 #include <stdlib.h>
 //function for trigonometric
-//Function 1
+//Function 1 double
 double* calculate_sin_double(double angle) {
     double* result= malloc(sizeof (double));
     *result=sin(angle);
     return result;
 }
-//Function 2
+//Function 2 double
 
 double* calculate_cos_double(double angle) {
     double* result= malloc(sizeof (double));
     *result=cos(angle);
     return result;
 }
-//Function 3
+//Function 3 double
 
 double* calculate_tan_double(double angle) {
     double* result= malloc(sizeof (double));