Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Open

Shadowys Group TitleBest ResponseYou've already chosen the best response.4
have you subbed \(\sin^2 x x = 1\cos^2 x\) into the eq to simplify it into a quadratic eq?
 one year ago

ewkmath Group TitleBest ResponseYou've already chosen the best response.0
no i haven't but i'll try it out right now thanks :)
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.4
u r welcome. The solution should be trivial after the substitution. :)
 one year ago

ewkmath Group TitleBest ResponseYou've already chosen the best response.0
I tried it but i still don't get it..
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.4
subbing, you should get, \(22\cos^2 x + 9 \cos x +3=0\) which equals, \(2\cos^2 x + 9 \cos x +5=0\) let u = cos x the equation becomes \(2u^2 + 9 u +5=0\) which is a quadratic equation of u. You can use the general formula to solve for u.
 one year ago

ewkmath Group TitleBest ResponseYou've already chosen the best response.0
thanks o much.. i really appreciate it
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.4
you're welcome :)
 one year ago
See more questions >>>
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.