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

Lena772 Group Title

(a) find an equation of the tangent line to the graph of at the given point, (b) use a graphing utility to graph the function and its tangent line at the point, and (c) use the derivative feature of the graphing utility to confirm your results.

  • 11 months ago
  • 11 months ago

  • This Question is Closed
  1. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    function: y= cos 3x point: (pi/4, -sqrt2/2)

    • 11 months ago
  2. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    where wer u stuck ?

    • 11 months ago
  3. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i saw u doing a similar problem the other day ? :)

    • 11 months ago
  4. Decart Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    take the derivative

    • 11 months ago
  5. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I just get confused when trig is added in

    • 11 months ago
  6. Decart Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    do you know what the derivative is

    • 11 months ago
  7. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    dy/dx

    • 11 months ago
  8. Decart Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    -3sin3x

    • 11 months ago
  9. Decart Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    right

    • 11 months ago
  10. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yes

    • 11 months ago
  11. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so, slope = m = dy/dx = -3sin3x

    • 11 months ago
  12. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    since u want the slope at point: (pi/4, -sqrt2/2) evaluate slope at x = pi/4

    • 11 months ago
  13. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    dy/dx at x = pi/4 :- -3sin(3*pi/4) = ?

    • 11 months ago
  14. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    -0.123

    • 11 months ago
  15. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @ganeshie8

    • 11 months ago
  16. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    that doesnt look right you should get :- dy/dx at x = pi/4 :- -3sin(3*pi/4) = \(\large \frac{-3}{\sqrt{2}}\)

    • 11 months ago
  17. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    now that u knw slope, m = \(\large \frac{-3}{\sqrt{2}}\) point: (pi/4, -sqrt2/2) wats the equation of tangent in point slope form ?

    • 11 months ago
  18. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y-(-sqrt2/3)=(-3/sqrt2)(x-(pi/4)

    • 11 months ago
  19. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ?

    • 11 months ago
  20. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @hartnn

    • 11 months ago
  21. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    thats right !

    • 11 months ago
  22. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    So that's for a? What would the graph look like for b? Do I just put that equation into Geogebra?

    • 11 months ago
  23. Lena772 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @ganeshie8

    • 11 months ago
  24. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yup graph all 3 below :- 1) function: y= cos 3x 2) point: (pi/4, -sqrt2/2) 3) tangent : y-(-sqrt2/\(\color{red}{2}\))=(-3/sqrt2)(x-(pi/4)

    • 11 months ago
  25. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    u should get exactly like the one attached

    • 11 months ago
    1 Attachment
    • 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.