77 Chapter 6: Rules, Rules, Rules: The Differentiation Handbook 3 ^ h *21. f x = x 4 sin x g x = ^ lnxh 2 ^ h x = f l ^ h ? *22. 5 x - 4 g x = ? l ^ h Solve It Solve It 3 d 4 2 x 3 *23. y = cos x 2 *24. dx ` tan e j = ? y = l ? Solve It Solve It