TT /2 Q4. (8 marks) Using the corresponding reduction formula, evaluate sin" x dx. 0 Hint: it will be necessary to solve this problem separately if n is even (i.e., n = 2k, where k = 1, 2, 3, ...) and if n is odd (i.e., n = 2k + 1, where k = 0, 1, 2, 3, ...)