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  • HW12_1

    (From: Exercise 1 on P.269)
    The factorial of 4 (written as 4!) is 4*3*2*1 = 24, and 3! is 3*2*1 = 6, so it follows that 4! = 4*3!, or more generally:
    fact(n) = n*fact(n-1).
    The limiting case is when n is 1, 1! = 1. Write a recursive function which calculates factorials, and test it.

  • HW12_2

    (From: Exercise 3 on P.269)
    The trigonometry functions (sin(), cos(), and tan()) in the standard math library take arguments in radians. Write three equivalent functions, called sind(), cosd(), and tand(), which takes arguments in degrees. All arguments and return values should be type double. (You may need to include <math.h> if necessary.)