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

erynm Group Title

2sin^2x+sinx-1=0

  • one year ago
  • one year ago

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

    let u = sin(x) 2u^2 + u - 1 = 0

    • one year ago
  2. apple_pi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Can you solve this?

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

    could you expand to the next step?

    • one year ago
  4. nabsz.j Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    can't you just solve as a quadratic ... or cant you roll this way because its trig?

    • one year ago
  5. Lizzardo Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    next step: factorise: (2u-1)(u+1)=0 thus 2u-1 = 0 or u+1=0 u=1/2 u=-1 now sub back sinx

    • one year ago
  6. apple_pi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    is your domain for x specified?

    • one year ago
  7. Lizzardo Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    sinx = 1/2 or sinx=-1 now solve for x

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

    ahh, got it! I didn't realize it was a quadratic. Thank you so much!

    • 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.