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

Aadarsh Group Title

Trignometry Question

  • 2 years ago
  • 2 years ago

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

    AAD-wait for me...

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

    Solve: [1/(sin 45 sin 46)] + [1/(sin 47 sin 48)] + ........................+ [1(sin 133 sin 134)]

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

    good one...

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

    The general term of the series is: \[t(n)=1/\sin x \sin (x+1)\] Now expand sin(x+1) using sin(A+B). Simplify, and you'll get a really simple general term/

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

    FNSTSE Question

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

    i think mani's approach is good!!!!

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

    |dw:1334419200461:dw|

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

    So, we get |dw:1334419282831:dw| ?

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

    Use (sinx)^2=1-cos2x/2 sinxcosx=sin2x/2 Where did sin1 and cos1 go, sarkar?

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

    sin 90 =1, isn't it?

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

    Actually, sin1=1.17. Yes, aadarsh. You sure you got that general term, Aadarsh?

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

    sin1 almost equals 1

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

    Can u say the detailed steps @Mani_Jha bhai and @Sarkar bhai? using all the steps?

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

    Uh oh, I am not getting a simplified general term using that. Let me think on this.

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

    Sure. Try to post it as soon as possible.

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

    note=everyone who have answered this Q is of level 30 and above....lol

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

    I think most of them have left this question. i asked to my teacher, she couldn't answer it.

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

    http://www.wolframalpha.com/input/?i=sum_%28k%3D45%29%5E133+1%2F%28sin%28k%29*sin%28k%2B1%29%29 something like 1.355867228946

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

    Great!!!!!! Thanks @Recursing . But I want to know the procedure.

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

    wolframalpha can't find a way to simplify it, if wolframalpha can't I'm sure that it's waaay beyond my level of math knowledge, and I think it's probably impossible to reduce it.

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

    Oh, wait, i used radians.

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

    Well, it doesn't get much better http://www.wolframalpha.com/input/?i=sum_%28k%3D45%29%5E133+1%2F%28sin%28k*pi%2F180%29*sin%28%28k%2B1%29*pi%2F180%29%29 The partial sums graph looks close to a line, maybe? http://www.wolframalpha.com/input/?i=sum_%28k%3D45%29%5E133+1%2F%28sin%28k%C2%B0%29*sin%28%28k%2B1%29%C2%B0%29%29

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

    @Mani_Jha , @Taufique , @AravindG , @gurvinder bhai, please try once more.

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

    @salini , @shruti , @rebeccaskell94 , @KatrinaKaif please try.

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

    Actually, its a 3 mark question. I just guessed and wrote answer as "1". I don't know how much marks I may have got. But just waiting for over 6 months to get the rite answer. Hope u all help.

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

    @wasiqss , @lgbasallote , @sheena101 , @Akshay_Budhkar , @Ishaan94 please try

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

    @Sarkar , @payalvsangle , @heena , @apoorvk please try.

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

    I've tried again like this: \[1/\sin133\sin134=1/\sin46\sin47\] \[1/\sin132\sin131=1/\sin48\sin49\] Similarly, for every term from the right. Finally, \[1/\sin91\sin92=1/\sin89\sin88\] Now we'll add these fractions. \[(\sin47\sin48..\sin89)+(\sin45\sin46\sin49..\sin50).......(\sin45\sin46\sin47\sin50..\sin89)\] +\[(\sin45\sin48..\sin89)(\in numerator)\] Denominator= \[(\sin45\sin46.........\sin89)\] Now we'll add the first and last, then second and second last and so on in the numerator. \[((\sin48.\sin89)(\sin45+\sin47)+\sin45\sin46..\sin89(\sin47+49)......)/(\sin45..\sin89)\] Now use sinA+sinB=2sin(A+B)/2cos(A-B)/2 \[(\sin48..\sin ^{2}88\sin89+\sin45..\sin ^{2}84\sin89...)/(\sin45\sin46...)\] sin88 gets cancelled from the denominator. \[(\sin48..\sin89(\sin88+\sin84.....\sin48))/\sin45..\sin89\]

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

    So, final answer = ? I could n't understand clearly.

    • 2 years ago
  30. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Aadarsh? Is it [1/(sin 45 sin 46)] + [1/(sin 47 sin 48)] + .... + [1(sin 133 sin 134)], or [1/(sin 45 sin 46)] +[1/(sin46 sin47)]+ [1/(sin 47 sin 48)] +...+ [1(sin 133 sin 134)]

    • 2 years ago
  31. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @Aadarsh

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

    The first one

    • 2 years ago
  33. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Oh hmm

    • 2 years ago
  34. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\large \sum_{k=0}^{44} \frac1{\sin(45+2k)\cdot\sin(45+2k+1)}\]

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

    How tro solve it? What is the final answer?

    • 2 years ago
  36. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\large \sum_{k=0}^{44} \frac{2}{(\sin2k + \cos 2k)(\sin(2k+1) + \cos(2k+1))}\] No idea lol I will have to think about it.

    • 2 years ago
  37. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\large \sum_{k=0}^{44} \frac{2}{\sin(4k+1) + \cos 1}\]

    • 2 years ago
  38. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    This must be a Multiple Choice Question, what are the options?

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

    Subjective Question, 3 marks

    • 2 years ago
  40. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I have a feeling something is missing :/ http://www.wolframalpha.com/input/?i=\sum_{k%3D0}^{44}+\frac{2}{\sin%284k%2B1%29+%2B+\cos+1}

    • 2 years ago
  41. Ishaan94 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @siddhantsharan

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

    @Aadarsh read the attach file

    • 2 years ago
    1 Attachment
  43. Aadarsh Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Greta answer @Taufique bhai. Thanks a lot.

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

    @Aadarsh Welcome Aadarsh ji...

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

    Welcome bhaijan............

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

    hehe Bhaijan...

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

    heheheheheheh

    • 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.