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VIbarguen1
Group Title
Cal help?
find the intervals for which f is increasing or decreasing and locate all relative extrema on (0,2pi).
f(x)= cos x / 1 + sin ^ 2x
 10 months ago
 10 months ago
VIbarguen1 Group Title
Cal help? find the intervals for which f is increasing or decreasing and locate all relative extrema on (0,2pi). f(x)= cos x / 1 + sin ^ 2x
 10 months ago
 10 months ago

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satellite73 Group TitleBest ResponseYou've already chosen the best response.0
did you take the derivative?
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
Yep I got f'(x) = 2 sin(x) cos (2x) + 5 /cos (2x)3 )^2
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
it is so long im not sure its right
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
@satellite73
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
@RaphaelFilgueiras
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
dw:1389408369353:dw
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
could you help me solve that I have no idea how
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
use sin²(x)+cos²(x)=1> cos²(x)=1sin²(x), and then you will have only sin x in your equations
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
dw:1389408745656:dw
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
raphael i'm sorry i am not following, where did the Z come from? and how does that get me to the extrema?
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
Z means k belong to the interger set,it's just a generical ans
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
x= 0 and 2 pi will be your solutions
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
and pi
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
is that my min and max solutions?
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
and it would be decreasing because its positive right?
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
min x= pi max are both x=0 and 2pi
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
ok got it
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
when sin(x)> 0 it will be decreasing x in]0,pi[ when sinx(x)<0 it will be increasing x in ]pi,2pi[
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
decreasing f'<0 increasing f'>0
 10 months ago

VIbarguen1 Group TitleBest ResponseYou've already chosen the best response.0
thank you so much
 10 months ago

RaphaelFilgueiras Group TitleBest ResponseYou've already chosen the best response.1
you are welcome
 10 months ago
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