Computation of cosine (in radians) is given as cos x = sigma_n = 0^a (-1)^n x^2n/(2n)!. Write a C program to compute the cosine value. Print the cosine value on the terminal console. The user input x is a double precision floating-point value between -5 and 5. The user input a is a 64-bit non-negative integer less than 16. Do not use any predefined functions. Comment your code