A community for students.
Here's the question you clicked on:
 0 viewing
rachna
 4 years ago
Determine if (y=tan x + sec x) has any maximums or minimums for pi/2 < x < pi/2 and justify your answer.
rachna
 4 years ago
Determine if (y=tan x + sec x) has any maximums or minimums for pi/2 < x < pi/2 and justify your answer.

This Question is Closed

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0y'=sec(x)^2+sin(x), y'=0 when sec(x)^2=sin(x), solve, profit!

rachna
 4 years ago
Best ResponseYou've already chosen the best response.0wait how dou get sin(x)??

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0Oh, sin(x) was my mistake.

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0Apparently, I'm still bad at calculus. XP It should be (sin(x))(cos(x)^2).

rachna
 4 years ago
Best ResponseYou've already chosen the best response.0i thought derivative of sec x is sec x tan x

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0sin(x)/cos(x)^2=tan(x)/cos(x)=tan(x)sec(x)

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0Same thing. I just didn't remember it, I had to prove it out.

rachna
 4 years ago
Best ResponseYou've already chosen the best response.0ok so what i do now after i got the derivative ??

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0sec(x)^2+tan(x)sec(x)=y'=0, tan(x)+1=0, tan(x)=1, x=arctan(1)

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0Woops, my bad. Wait a sec.

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0(sec(x)+tan(x))=0, tan(x)=sec(x)

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0there we go. when do tan(x) and sec(x) intersect?

rachna
 4 years ago
Best ResponseYou've already chosen the best response.0wait a minute i need to look at unit circle, i dont have those memorized

badreferences
 4 years ago
Best ResponseYou've already chosen the best response.0sin(x)/cos(x)=1/cos(x), sin(x)=1 when is this true?
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.