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

ihatealgebrasomuch Group Title

is the trigonometric ratio of cos225degrees 1? (im in the unit circle)

  • one year ago
  • one year ago

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

    no.... cos (225 degrees) is NOT 1

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

    since you're on the unit circle.... look at the x-coordinate of 225 degrees...

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

    cos (225 degrees) = the x-coordinate of the point on the unit circle.

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

    im confused though, because if its a right triangle, and the reference angle is 45 degrees, then the opposite angle is also 45 degrees, making it a 45-45-90 triangle and the two legs' side lengths are the same so they would both be |dw:1359842106830:dw|

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

    \(\large cos(225 ^\circ)=-\frac{\sqrt2}{2} \) \(\large tan (225 ^\circ)=\frac{\frac{\sqrt2}{2}}{-\frac{\sqrt2}{2}}=-1 \)

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

    |dw:1359842455017:dw|

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

    its just negative square root 2 /2?

    • 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.