Problem 3: Evaluating cos(x) The value of cos(x) is evaluated as follows: cos(x) = 1-2, + 4,-6! + 8! + x2n (2n)! + Where n is related to the accuracy level required for cos(x). Write a C++ program that asks the user to input n and x and then the program will evaluate cos(x) up to the 2n terms. Sample input/output: Enter n and x: 10 3.1 cos(3.1) = -9.999135