Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

haleyking345 Group Title

Solve the equation: a.) 4 cosx=1+2 cosx I have no idea what to do. Help!!!

  • one year ago
  • one year ago

  • This Question is Closed
  1. phi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I would add -2 cos x to both sides (think of cos x as just another variable) 4 cos x - 2 cos x = 1 + 2 cos x - 2 cos x the 2 cos x - 2 cos x is 0 4 cos x - 2 cos x is 2 cos x. you get 2 cos x = 1 divide both sides by 2

    • one year ago
  2. whpalmer4 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Sometimes to aid in thinking of cos x as just another variable, as phi suggests, it's easier to just rewrite the equation: 4c = 1 + 2c 2c = 1 c = 1/2 Now put the cos x back in cos x = 1/2

    • one year ago
    • Attachments:

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.