5) Integrate csc 2 x cot x dx using the substitution u = cot x and using the substitution u csc x. Show the results are the same. 5) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Express the given quantity in terms of sin x or cos x. 6) cos (2π-x) A) cos x + sin x B) - cos x C) cos x D) cos x - sin x