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Need some help identifying the increase intervals of the graph of xtanx
 one year ago
 one year ago
Need some help identifying the increase intervals of the graph of xtanx
 one year ago
 one year ago

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Calle87Best ResponseYou've already chosen the best response.0
i know this is a even function about the y axis, and the domain and asymptotes are pi/2,pi/2
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
just wondering how to show the intervals of increase and decrease
 one year ago

VenomblastBest ResponseYou've already chosen the best response.0
so 90 degrees <x<90 degrees
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
usually i take f'x and solve for 0
 one year ago

VenomblastBest ResponseYou've already chosen the best response.0
i see no 0. is this is an equation?
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
@zepdrix hey do you think you could explain how they designate zero as a critical point?
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
should i just know that, from the x and y intercepts and the even symetry? and a basic knowledge of the tanx graph?
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
because when i set my derivative = 0 i have problems
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
dw:1349988578994:dw Hmm yah this derivative does seem to be putting up a fight :\ Hmmmmm
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
i tried changing everything to sines and cosines and still a mess
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
dw:1349988855254:dw Ah good call, I think that's how you find it! :) The top is a big mess, yes. But the bottom I think you can solve for a critical point.
 one year ago

VenomblastBest ResponseYou've already chosen the best response.0
get the common denominator. so multiply cosx on the 1st term
 one year ago

VenomblastBest ResponseYou've already chosen the best response.0
i guess he/she got it from here
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
i think the top should be ignored
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
the book doesent have a mention of it
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
neither does the graph
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
http://www.wolframalpha.com/input/?i=graph+xtanx
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
maybe it would matter if the interval was larger than pi/2,pi/2
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
Hmmm wait what was I saying? cos x = 0 Hmm that should give you x = pi/2 right? why did i say it was x = 0? Hmmmmmmmmmmmmmmmmm Now I'm back to being confused about where the 0 critical point is coming from :D lol
 one year ago
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