Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

msingh

  • one year ago

plse solve this

  • This Question is Closed
  1. ajprincess
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    \[\theta=\cos^{-1}\frac{-\sqrt3}{2}\] \[\cos\theta=\frac{-\sqrt3}{2}\] So vat is the value of \(\theta\)? @msingh

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

    cos60=1/2

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

    well ya. but there is another value.

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

    -cos30

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

    why do you need to find theta? It's just cos(A+B)

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

    hw abt 5pi/6?

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

    i mean cos(5pi/6)

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

    okay

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

    \[\cos(\frac{5\pi}{6}+\frac{\pi}{4})=?\]

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

    nw as @apple_pi mentioned u can use \(\cos(A+B)=\cos A\cos B-\sin A\sin B\).

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

    @ajprincess why did you find theta? You could just leave it as acos(...), then cos(acos(...)) would cancel and then use pythagorus to find sin(acos(...))

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

    well i found it easy to find theta first nd then do..:)

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

    ok whatever suits you :p

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

    @ajprincess can u plse tell me exact answer

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

    Well i am really sorry. I am nt supposed to give direct answers. pls check the code of conduct

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

    |dw:1367584877456:dw|

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

    plug in the values nd simplify

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

    yes, after this, i m getting cos(5pi/6)-sin(5pi/6)

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

    what is cos(pi/4)?

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

    oh again i did wroong i place 1 as it is 1/ root2

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

    what are cos(5pi/6),sin(pi/4) and sin(5pi/6)?

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

    -root3/2 1/root2 root3/2

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

    first two values are right. chck the last one

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

    - root 3/2

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

    nope. sin150=1/2.

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

    okay

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

    150=5pi/6

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

    nw plug in those values and simplify

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

    okay

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

    i got (1/2root2)*(-root3-1)

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

    yup right:)

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

    @ajprincess thank you

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

    welcome:)

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

    Search OpenStudy
    • 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.