I. Define the function [In(r+ 1)] cosh r + tanr ,r20 (sinh r) sec- (r – 2) S(x) = ,z <0 1. Show that f is continuous at r = 0. 2. Is f differentiable at z = 0? Justify your answer. П. Find dy There is no need to simplify. d.r cos- (sin r) – sech(tan-r) 1. y = ecosh z 4r* (log, a) 2. y = (csc" r)Vsinh(2r – 8 III. Find dy using implicit differentiation. dr sec (ry?) = (cosh r)(tanh =+v5) + 2 csc-" (tan(y + 1)) It.

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