Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sarahi_smiles

  • 2 years ago

Solve 2 - 3 cos x = 5 + 3 cos x for 0 degrees lessthan x lessthan 180 degrees (1 point) can anyone help me...

  • This Question is Closed
  1. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The possible answers are 150 degrees, 30 degrees, 60 degrees, and 120 degrees...?

  2. BrittanyFrench
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Hey I'm tryin to figure this one out!!

  3. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh ok...if you could help me I would greatly appreciate it!!

  4. BrittanyFrench
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :) Sure thing. This is geomtry right? Or Algebra 2?

  5. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I think algebra 2...I'm in precal but shes going over several subject at one time...

  6. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Like an over view of algebra...

  7. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    solve the equation. it will give you cosx=-1/2 --> x=120 degrees

  8. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks so much...could you help me answer another question @yrelhan4

  9. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    cheers! only if i know it.

  10. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I have to find the angle the normal makes with the positive x-axis....& I have to rewrite it each equation in the normal for and solve the length of the normal... 1. 3x-2y-1=0 2. 5x+y-12=0 3. 4x+3y-4=0

  11. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    If not its ok...but thanks anyway!!!

  12. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    normal to these lines?

  13. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yea..idk what it means either. :/ It said: find the angle the normal makes with the positive x–axis. Hint: You should first rewrite each equation in normal form and solve for the length of the normal.

  14. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    see that normal from of a line is xsino + ysino =P whee o is angle made with positive x axis and p is the length of normal from origin to the line.

  15. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    can you find a line perpendicular to the given lines and passing through origin?

  16. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok...no?

  17. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    slope of a line is -(coefficient of x)/(coefficient of y). and m18m2 =-1 where m1 is the slope of the given line and m2 of the normal. write the normal line in the form of y=mx+c. substitute x,y=0,0 as it passes through the origin. this will give you value of c. plug this value back into the equation. suppose that the line is ax+by+c=0. thelength of perpendicular from x1,y1 is ax1 +by1+c/sqrt(a^2 + b^2). susbtitute 0,0 in place of x1,y1. this will give you value of perpendicular. i am still working on the angle. i seem to know it but cant recall it.

  18. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    in the first line it is m2*m1=-1

  19. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    If its confusing you & you can't figure it out its ok....I'm just not that good in math lol

  20. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    just tell me if you get the length of the normal. or i'll you refer you to a site.

  21. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Can you just refer me....because I'm really confused

  22. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Sorry...

  23. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    its alright sweety. i was as poorer at math. chill!! http://answers.yahoo.com/question/index?qid=20090817231959AASOXEf look at this to find the line perpendicular to the given line. and then look at my explanation. and i am not following the hint you gave me. i dont follow it. this method of mine makes more sense to me.

  24. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    feel free to back to me if any problem.

  25. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    slope of a line=tano. so arctan[-(coefficient of x)/coefficient of y)] will give you the angle.

  26. sarahi_smiles
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok thanks!!!

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

    • Attachments:

Ask your own question

Ask a Question
Find 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
  • 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.