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

Lukecrayonz

sin^2(x-1)/cos(-x)

  • one year ago
  • one year ago

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

    @amistre64

    • one year ago
  2. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    might need to know alittle more about the question

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

    It just says to simplify @amistre64

    • one year ago
  4. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    already seems "simple" to me :/

    • one year ago
  5. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    you can try to shuffle some things about i spose; sin^2 = 1-cos^2 cos(a+b) = cosa cosb - sina sinb and stuff

    • one year ago
  6. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    cos(-x) = cos(x) ... just some basic trig identities and properties that might be useful

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

    @amistre64 would you like the possible answers?

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

    Also quick question on another problem I'm stuck on.

    • one year ago
  9. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    options would be able to narrow it down :)

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

    @amistre64 You there?

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

    @saifoo.khan

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

    A. -sinx B. cosx C. Sinx D. -cosx

    • one year ago
  13. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    Where are you stuck? @Lukecrayonz

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

    @saifoo.khan don't even know where to start :'(((

    • one year ago
  15. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    Use the 4th identity for numerator. http://www.a-levelmathstutor.com/images/trigonometry/ca-identities01.jpg

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

    The one Sin(A-B)?

    • one year ago
  17. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    Yep.

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

    How.. That makes no sense to me?

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

    If its sin^2 how would I use Sin(A-B)?

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

    Ohhh. :o

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

    hmm?

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

    I think I got it

    • one year ago
  23. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    I guess, @satellite73 or @amistre64 will help you here. :/

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

    sin^2x-1=-cos^2x cos(-x)=cosx so the answer is -cosx

    • one year ago
  25. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    Wait. How?

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

    -cos^2x/cosx=-cosx?

    • one year ago
  27. saifoo.khan
    Best Response
    You've already chosen the best response.
    Medals 0

    Step 1.

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

    cos(-x)=cosx

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

    Pythagorean identities sin^2x+cos^2x=1

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

    \[\frac{-\cos^2(x-1) +1}{\cos(-x)}\]Then we should get this?

    • one year ago
  31. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    shuffling trigs is a pain :)

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

    No pain, no gain. ;)

    • one year ago
  33. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    do you need to show work?

    • one year ago
  34. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    http://www.wolframalpha.com/input/?i=simplify+sin%5E2%28x-1%29%2Fcos%28-x%29+ i dont see it popping out an option that you have

    • one year 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.