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

lilg132 Group Title

trigonometry help

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1328053926336:dw|

    • 2 years ago
  2. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i need to work out the length of BC and the phi angle

    • 2 years ago
  3. Mertsj Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Law of Cosines: c^2=5^2+862-2(5)(8)cos 115.

    • 2 years ago
  4. Mertsj Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[(BC)^2=5^2+8^2-2\times5\times8\cos 115\]

    • 2 years ago
  5. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i've been taught just to do (bc)^2 = ac^2 + ab^2

    • 2 years ago
  6. Mertsj Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    then after you find BC use the law of sines.\[\frac{\sin 115}{BC}=\frac{\sin \theta}{5}\]

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

    this is not a right triangle so the pythagorean theorem does not apply.

    • 2 years ago
  8. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhh ok

    • 2 years ago
  9. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i thought i was doing something wrong :p

    • 2 years ago
  10. lilg132 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    let me try and do it now thanks for pointing that out

    • 2 years ago
  11. Mertsj Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yw

    • 2 years 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.