A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

Find cos θ if csc θ = 2 and θ is in quadrant II.

  • This Question is Closed
  1. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    OK so... Sin θ = 1/Csc θ so it would be 1/2 which is O/H? So the mesurements can be calculated using x^2 + y^2 = r^2?

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

    θ=60

  3. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    as......... if ....secθ=2 hence ...1/cosθ=2 cosθ=1/2 sin(90+θ)=1/2

  4. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hence .......θ=60

  5. dumbcow
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    csc = 1/sin --> 1/sin = 2 --> sin = 1/2 cos^2 = 1-sin^2 cos^2 = 1-(1/2)^2 cos^2 = 3/4 cos = sqrt3/2

  6. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thought since sin would = 1/2 and csc = 2 then wouldn't it be 30?

  7. dumbcow
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no theta = 150 since in quad 2

  8. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    of it's cosec θ then dumbcow is right

  9. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yea sqrt(3)/2

  10. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    would it be negative since it's in the II quadrant? and only thing positive in II quadrant is Sin and CSC?

  11. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sry fakshon ...i consideed it as sec θ

  12. dumbcow
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    correct, cos would be negative :)

  13. dumbcow
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @shivamsinha it happens :)

  14. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yep yep it's all good.

  15. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks for the help.

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.