Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sara1234

  • 2 years ago

Help please ?

  • This Question is Closed
  1. soty2013
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sure

  2. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you are looking for the number between 0 and \(\pi\) whose cosine is \(\frac{1}{2}\)

  3. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you still have that cheat sheet, look at the place on the upper half of the unit circle where the second coordinate is \(\frac{1}{2}\)

  4. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

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

    π/3 simple

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

    :)

  7. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok here is the picture |dw:1351127015253:dw|

  8. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    in this picture, \(\theta=\arctan(2)\) an angle whose tangent is 2 since tangent is "opposite over adjacent" i labelled the opposite side 2 and the adjacent side 1

  9. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the hypotenuse we find by pythagoras, it is \(\sqrt{1^2+2^2}=\sqrt{1+4}=\sqrt{5}\)

  10. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and using sine as "opposite over hypotenuse" we see that the sine of the angle is \[\frac{2}{\sqrt{5}}\]

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

    Search OpenStudy
    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.