A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 3 years ago

For a particular angle θ, the cosine function has the following values within one cycle of the function: cos 0=3, cos π/4=0, cos π/2=-3, cos 3 π/4 = 0, cos π=3 What is the rule of the cosine function?

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

    Huh? "What is the rule of the cosine function?" The only way I know how to read that is as an alternate form of, "What is the law of cosines?" Seems odd. OK. Well, if I had to guess... based on those values they have given you specific inputs and what the outputs of those are. You probably need to define the relationship, which would be to make a function that gets those answers.

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

    general cosine equation: \[y = Acos(Bx)\] from the unit circle we know that cos(0) = 1 A = 3 also we know that cos(pi) = -1 3 = 3cos(Bpi) 1 = cos(Bpi) thus B = 2 \[ y = 3\cos(2x)\]

  3. 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...


  • 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.