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Question Number 140530 by liberty last updated on 09/May/21

lim_(x→0)  (((x+y)sec (x+y)−ysec y)/x)=?

limx0(x+y)sec(x+y)ysecyx=?

Answered by EDWIN88 last updated on 09/May/21

 L′Ho^  pital  lim_(x→0)  ((sec (x+y)+(x+y)sec (x+y)tan (x+y)−0)/1)  = lim_(x→0)  ((x+y)tan (x+y)+1)sec (x+y)  = (y tan y +1) sec y

LHopital¨limx0sec(x+y)+(x+y)sec(x+y)tan(x+y)01=limx0((x+y)tan(x+y)+1)sec(x+y)=(ytany+1)secy

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