(Decimal to binary) Write a function that parses a decimal number into a binary number as a string. The function header is as follows: string dec2Bin(int value) See Appendix D, "Number Systems," for converting a decimal into a binary. Write a test program that prompts the user to enter a decimal number and displays its equivalent binary value.

Q: Make a code in c ++ given a number in binary, octal or hexadecimal system get the corresponding…

A: C++ code for a number in binary, octal, or hexadecimal system get the corresponding decimal number:…

Q: 3.Solve cos(0.25) correct to five decimal?

A: Method1: //include the necessary headers #include <iostream> #include<bits/stdc++.h>…