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-- Calculus~~ URGENT~!!! (https://www.jusunlee.com/forums/showthread.php?threadid=6963)

Posted by OrangeeeGirL on 10-21-2002 04:44 AM:

Lightbulb Calculus~~ URGENT~!!!

lim sin6x
x->0 sin5x

PLZ help soon~~~~~~~~~~

Posted by Crazydeb8ter on 10-21-2002 04:49 AM:

just plug in a number very close to zero (e.g. .000000000001) in for X

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Posted by OrangeeeGirL on 10-21-2002 05:05 AM:

but isn't there like a mathmatical way "algebra" to figure it out er sumthin?? :huh: cuz we only did pluggin in number close to 0 thing like a lonnggggg tym ago when we only started learning about limits..so i have to show the work and evrything..

Posted by az0nd2r3 on 10-22-2002 03:17 AM:

isnt it 6/5.....theres a rule that says
lim sin yx is equal to y over z
x->0 sin zx

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Posted by sangxjin on 10-24-2002 03:15 AM:

thats why the ti-89 was invented. sorry i couldnt help. im only in algebra ii.

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Posted by requiem on 11-22-2002 01:48 AM:

Re: Calculus~~ URGENT~!!!

quote:
Originally posted by OrangeeeGirL
lim sin6x
x->0 sin5x

PLZ help soon~~~~~~~~~~


Using L'Hospital's rule
lim
x->0 sin6x/sin5x
if that produces 0/0 take the derivative of top and bottom
SO
lim
x->0 6cos6x/5cos5x at 0, which is 6/5.
Yes I know someone already answered, but I'm sure she'd like a reason why.

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