Wednesday, July 16, 2014

Calculate the following limit: lim -x/tan(3x) as x approches to 0

You can only ask one question at a time. I have edited the
question to comply with the same.


We have to find the value
of lim x--> 0 [ -x/tan(3x)]


If we substitute x = 0,
we get the indeterminate form 0/0. This allows the use of l'Hopital's rule. We
substitute the numerator and denominator by their
limits.


lim x--> 0 [
-x/tan(3x)]


=> lim x--> 0[ -1/3*(sec
3x)^2]


substitute x =
0


=>
-1/3


The required limit is
-1/3

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