A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

when studing the unit a circle how do you know if its a positive or a negative

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

    If what is positive or negative?

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

    Think of the unit circle as a regular coordinate system. Where x and y are positive and negative on a regular coordinate system, it's the same for the unit circle. If that makes sense.

  3. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sin = y, when y is positive, sin is positive cos = x when x is positive cos is positive tan = y/x when y or x is negative, tan is negative

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

    oh heres an easy way to remember: (A)LL (S)TUDENTS (T)AKE (C)ALCULUS it starts from top right and goes counterclockwise. each corresponding letter in the paranthesis signals that the trig function is positive.

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

    here's an example: (i like to think in degrees cause i think its easier and my examples will be in DEGREES, but u can convert to radians if u want).... so if i say SIN(150), you know that the answer is positive since the letter S is in the second quadrant, same as 150 degrees.

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

    if i say COS(150), you know that the answer will be negative since COS is positive only in the first and third quadrant. any other quadrants will result in a negative answer for COS. same for the rest of the trig functions. oh and by the way, the A in ALL stands for ALL TRIG FUNCTIONS. so any trig in the first quadrant is a positive answer.

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

    if i say COS(150), you know that the answer will be negative since COS is positive only in the first and third quadrant. any other quadrants will result in a negative answer for COS. same for the rest of the trig functions. oh and by the way, the A in ALL stands for ALL TRIG FUNCTIONS. so any trig in the first quadrant is a positive answer.

  8. 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.