1- cotu dx du (a) cosu. dx du (b) -sinu. dx (c) - csc?u. du du (d) -cscu. cotu dx (e) None of these d csc-u dx du (a) JulVu2-1 'dx du (b)- Julvu-1 dx du (c) 1+ u2' dx (d)-- 1+ u2" dx du (e) None of these 3- coshu dx du (a) sinhu. dx du du (c) sech2u. dx du (b)-sinhu. dx (d)- csc²u. (e) None of these xp 4-tanh u tanh-u dx (d) du (b) du (c) du du (a) 1+ u? dx dx (e) None of these xp. n+IA 5- tanu dx du du du (a)-csc?u. (b)-cscu.cotu. dx (c)secu. tanu. dx (d) sec u. (e)None of these dx

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