A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 5 years ago

describe the parameters of the unit circle , and when the particle is moving clockwise/counterclockwise (how do i determine this)in this problem x=cost and y= -sin t

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

    First part: the equation of unit circle: x^2+y^2=1 the Pythagorean Trig Identity: [sin(t)]^2+[cos(t)]^2=1 Based on these two equations, I'd guess that the parameters of a unit circle are the absolute values of sine and cosine (x and y respectively). 2nd part: the parameters given simply describe a unit circle with y=-sin(t), since sine is an odd function (odd functions means f(-x)=-f(x)), -sin(t)=sin(-t) so this parametric function travels in the opposite direction of y=sin(t). Thus for all t<0 it is traveling counterclockwise, for all t>0, it's going to be clockwise, and if t=0, then there's no direction. Plug in the typical unit circle angles (pi/6, pi/4, pi/2 etc.) and see what direction it takes to get a geometric explanation.

  2. 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.