A community for students.
Here's the question you clicked on:
 0 viewing
Ac3
 one year ago
Simplify the following expression.
Ac3
 one year ago
Simplify the following expression.

This Question is Closed

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0\[\sqrt{(7xcosx)^2+(7xsinx+14cosx)^2}\]

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0the farthest i got to was\[\sqrt{49x^2196sinxcosx+196\cos^2x}\]

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0We want the radical to go away if possible or get the least amount of terms under the radical at least.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if you are lucky it is a prefect square

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0doesn't look like one though, maybe some other trick

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0I factored out a 49 and pulled it out of the radical. I was thinking maybe a trig identity for cos^2x not sure though.

freckles
 one year ago
Best ResponseYou've already chosen the best response.0was that thing really the initial problem?

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0Well if you want the initial problem I'll go ahead and give it to you.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the 49 comes out for sure not sure what else you can do here

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0graph if cool http://www.wolframalpha.com/input/?i=sqrt%28%287xcos%28x%29%29^2%2B%287xsin%28x%29%2B14cos%28x%29%29^2%29

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0r(t)=(7tsint+7cost)i + 7j + (7tcost7sint)k, Find the Tangential, Normal, Binormal, and the Torsion.

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0I think that's as far as it's going to go if I pull out the 49.

freckles
 one year ago
Best ResponseYou've already chosen the best response.0tangential is just ... \[r'(t) \text{ }\] \[r'(t)=[7 \sin(t)+7t \cos(t)7\sin(t)]i+[0]j+[7 \cos(t)7 t \sin(t)7 \cos(t)]k \\ r'(t)=7 t \cos(t) i 7t \sin(t) k\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.0\[r'(t)=\sqrt{(7 t \cos(t))^2+(7 t \sin(t))^2}\]

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0wait hold on let me check your derivative because I checked mine like 4 times.

freckles
 one year ago
Best ResponseYou've already chosen the best response.0it looks like your k component was different

freckles
 one year ago
Best ResponseYou've already chosen the best response.0yeah seems like you wrote 7cos(t)7 cos(t) as 7 cos(t)+7 cos(t) instead

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0ahhhhhhhh i screwed up the last part!!!!!

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0derivative of 7sint = 7cost < lmfao i'm an idiot.

freckles
 one year ago
Best ResponseYou've already chosen the best response.0maybe for a sec you got antiderivative and derivative mixed up :p it happens to all of us especially on those crazy trig functions

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0It happens to me all the time.

Ac3
 one year ago
Best ResponseYou've already chosen the best response.0I've been doing way too many integrals

freckles
 one year ago
Best ResponseYou've already chosen the best response.0anyways glad i can help
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.