A community for students.
Here's the question you clicked on:
 0 viewing
Hope99
 2 years ago
Solving trigonometric equations! Help!
Hope99
 2 years ago
Solving trigonometric equations! Help!

This Question is Closed

Hope99
 2 years ago
Best ResponseYou've already chosen the best response.0How did 3(1cos^2x)+cos^2x = 2 Became: 3  2cos^2x=2 ?! Could you guys help me with this one!

Hope99
 2 years ago
Best ResponseYou've already chosen the best response.0Why didnt we multiple 3 by (1  cos^2x) as a whole? Thanks!

campbell_st
 2 years ago
Best ResponseYou've already chosen the best response.0you need to solve for x so start with \[1  \cos^2(x) = \sin^2(x) \] and substituting will give \[3\sin^2(x) + \cos^2(x) = 2\] or \[2 \sin^2(x) + \sin^2(x) + \cos^2(x) = 1\] and \[\sin^2(x) + \cos^2(x) = 1\] so you have \[2 \sin^2(x) + 1 = 2\] or \[2\sin^2(x) = 1\] you should be able to solve for x now in my solution I've tried to show every step so you can follow it... there are quicker solutions...
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.