A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

owlet

  • one year ago

I'm wrong. My solution is wrong I think. Please help me. Question below

  • This Question is Closed
  1. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    My solution is also iincluded

    1 Attachment
  2. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    question: Solve \(\sf csc^2 x -1 = 4 cos^2x\)

  3. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    \(\large\color{black}{ \displaystyle \csc^2x-1=4\cos^2x }\) \(\large\color{black}{ \displaystyle \cot^2x=4\cos^2x }\) \(\large\color{black}{ \displaystyle \left[\cos^2x~/~\sin^2x\right]=4\cos^2x }\) \(\large\color{black}{ \displaystyle 1/\sin^2x=4 }\) \(\large\color{black}{ \displaystyle 1/\sin^2x=1/{~~}(^1/_4) }\) \(\large\color{black}{ \displaystyle \sin^2x=1/4 }\)

  4. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    this is what I would start off.

  5. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then take the square root right? so you'll also end up with sin x = positive/negative 1/2

  6. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh i think i get it.. I'm missing sin x= 1/2 which is Pi/6 so my solution is really messy. I'll try to do it again. thanks!

  7. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and 5pi/6 i think

  8. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    * sin(x) = ½ * or * sin(x) = - ½ *

  9. ParthKohli
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\cos (x) = 0\]

  10. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1443623788259:dw|

  11. owlet
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'll start all over again, and I'll check if I'll get it right again.

  12. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.