A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

In ∆ABC, if a = 8.75 centimeters, c = 4.26 centimeters, and m B = 87°, what is the length of b to two decimal places?

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

    A)8.92 CM B)9.41CM C)9.53CM D)13.01 E)15.36

  2. Itsyacoolgrl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    you will need the law of cosines to solve it b2=a2+c2−2a×c×cos(B) just substitute your values

  3. Itsyacoolgrl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Solution: cosB= (a^2+c^2-b^2)/2ac b = sqrt(a^2+c^2-2ac*cosB) = sqrt(8.75^2+4.26^2-2*8.75*4.26*cos87) =9.53 So b=9.53cm

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

    my teacher hasn't taught us that yet and shes giving us stuff to do can you walk me through

  5. Itsyacoolgrl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Really? how does she expect you to solve it if you don't know "sohcahtoa" What grade are you in?

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

    I don't know , ima a sophomore

  7. Itsyacoolgrl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Hmmm, sorry i'm a freshman. Is this for geometry?

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

    yes

  9. Itsyacoolgrl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    That's weird :/ I learned sohcahtoa in my freshman year, (I'm going to be a sophomore in the upcoming year). I don't know how to help you but goodluck!

  10. 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.